# Sine Wave

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2

``

    use_synth :beep

A simple pure sine wave. The sine wave is the simplest, purest sound there is and is the fundamental building block of all noise. The mathematician Fourier demonstrated that any sound could be built out of a number of sine waves (the more complex the sound, the more sine waves needed). Have a play combining a number of sine waves to design your own sounds!

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Blade Runner style strings

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 100
vibrato_rate: | 6 | vibrato_depth: | 0.15 | vibrato_delay: | 0.5 | vibrato_onset: | 0.1

``

    use_synth :blade

Straight from the 70s, evoking the mists of Blade Runner, this simple electro-style string synth is based on filtered saw waves and a variable vibrato.

Introduced in v2.6

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 100 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
vibrato_rate: | Number of wobbles per second. For realism this should be between 6 and 8, maybe even faster for really high notes. Default: 6 Must be a value greater than or equal to 0.0,must be a value less than or equal to 20.0 May be changed whilst playing Has slide options to shape changes
vibrato_depth: | Amount of variation around the central note. 1 is the sensible maximum (but you can go up to 5 if you want a special effect), 0 would mean no vibrato. Works well around 0.15 but you can experiment. Default: 0.15 Must be a value greater than or equal to 0.0,must be a value less than or equal to 5.0 May be changed whilst playing Has slide options to shape changes
vibrato_delay: | How long in seconds before the vibrato kicks in. Default: 0.5 Must be zero or greater Can not be changed once set
vibrato_onset: | How long in seconds before the vibrato reaches full power. Default: 0.1 Must be zero or greater Can not be changed once set

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Brown Noise

amp: | 1 | pan: | 0 | attack: | 0 | decay: | 0
sustain: | 0 | release: | 1 | attack_level: | 1 | decay_level: | sustain_level
sustain_level: | 1 | env_curve: | 2 | cutoff: | 110 | res: | 0

``

    use_synth :bnoise

Noise whose spectrum falls off in power by 6 dB per octave. Useful for generating percussive sounds such as snares and hand claps. Also useful for simulating wind or sea effects.

Introduced in v2.0

## Options

amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 110 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
res: | Filter resonance as a value between 0 and 1. Large amounts of resonance (a res: near 1) can create a whistling sound around the cutoff frequency. Smaller values produce less resonance. Default: 0 Must be zero or greater,must be a value less than 1 May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Chip Bass

note: | 60 | note_resolution: | 0.1 | amp: | 1 | pan: | 0
attack: | 0 | decay: | 0 | sustain: | 0 | release: | 1
attack_level: | 1 | decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2

``

    use_synth :chipbass

A 16 step triangle wave modelled after the 2A03 chip found in voice 3 of the NES games console. This can be used for retro sounding basslines. For complete authenticity with the 2A03 bear in mind that the triangle channel on that chip didn’t have a volume control.

Introduced in v2.10

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 60 Must be zero or greater May be changed whilst playing Has slide options to shape changes
note_resolution: | Locks down the note resolution to be multiples of this (MIDI) number. For example, a `note_resolution:` of 1 will only allow semitones to be played. When used in conjunction with `note_slide:` produces a staircase of notes rather than a continuous line which is how things were on the NES. Set to 0 to disable. This wasn’t a feature of this triangle (bass) channel on the original chip but some emulators have added it in since. Default: 0.1 Must be zero or greater May be changed whilst playing
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Chip Lead

note: | 60 | note_resolution: | 0.1 | amp: | 1 | pan: | 0
attack: | 0 | decay: | 0 | sustain: | 0 | release: | 1
attack_level: | 1 | decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2
width: | 0

``

    use_synth :chiplead

A slightly clipped square (pulse) wave with phases of 12.5%, 25% or 50% modelled after the 2A03 chip found in voices 1 and 2 of the NES games console. This can be used for retro sounding leads and harmonised lines. This also adds an opt ‘note_resolution’ which locks the note slide to certain pitches which are multiples of the step size. This allows for emulation of the sweep setting on the 2A03.

Introduced in v2.10

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 60 Must be zero or greater May be changed whilst playing Has slide options to shape changes
note_resolution: | Locks down the note resolution to be multiples of this (MIDI) number. For example, a `note_resolution:` of 1 will only allow semitones to be played. When used in conjunction with `note_slide:` produces a staircase of notes rather than a continuous line which is how things were on the NES. Set to 0 to disable. This wasn’t a feature of this triangle (bass) channel on the original chip but some emulators have added it in since. Default: 0.1 Must be zero or greater May be changed whilst playing
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
width: | Which of the three pulse_widths to use - 0 => 12.5%, 1 => 25%, 2 => 50% Default: 0 Must be one of the following values: [0, 1, 2] May be changed whilst playing

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Chip Noise

amp: | 1 | pan: | 0 | attack: | 0 | decay: | 0
sustain: | 0 | release: | 1 | attack_level: | 1 | decay_level: | sustain_level
sustain_level: | 1 | env_curve: | 0 | freq_band: | 0

``

    use_synth :chipnoise

Generates noise whose values are either -1 or 1 (like a pulse or square wave) with one of 16 particular frequencies. This is similar to the noise channel on the 2A03 chip used in the NES games console, although it lacks the same Pseudo-Random Number Generator (PRNG) and doesn’t implement the 2A03’s lesser used noise mode. The amplitude envelope defaults to moving by step to keep that 16 bit feel and this synth also has a slight soft clipping to better imitate the original sound of the device. Use for retro effects, hand claps, snare drums and hi-hats.

Introduced in v2.10

## Options

amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 0 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
freq_band: | Which of the 16 frequency bands to use, from 0 to 15. These range from 220Hz to 225kHz as on the original chip. This arg will accept floats but round to the nearest integer to allow for sweeping through the 16 set points with envelopes. Default: 0 Must be a value between 0 and 15 inclusively May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Clip Noise

amp: | 1 | pan: | 0 | attack: | 0 | decay: | 0
sustain: | 0 | release: | 1 | attack_level: | 1 | decay_level: | sustain_level
sustain_level: | 1 | env_curve: | 2 | cutoff: | 110 | res: | 0

``

    use_synth :cnoise

Generates noise whose values are either -1 or 1. This produces the maximum energy for the least peak to peak amplitude. Useful for generating percussive sounds such as snares and hand claps. Also useful for simulating wind or sea effects.

Introduced in v2.0

## Options

amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 110 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
res: | Filter resonance as a value between 0 and 1. Large amounts of resonance (a res: near 1) can create a whistling sound around the cutoff frequency. Smaller values produce less resonance. Default: 0 Must be zero or greater,must be a value less than 1 May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Dark Ambience

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 110
res: | 0.7 | detune1: | 12 | detune2: | 24 | noise: | 0
ring: | 0.2 | room: | 70 | reverb_time: | 100

``

    use_synth :dark_ambience

A slow rolling bass with a sparkle of light trying to escape the darkness. Great for an ambient sound.

Introduced in v2.4

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 110 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
res: | Filter resonance as a value between 0 and 1. Large amounts of resonance (a res: near 1) can create a whistling sound around the cutoff frequency. Smaller values produce less resonance. Default: 0.7 Must be zero or greater,must be a value less than 1 May be changed whilst playing Has slide options to shape changes
detune1: | Distance (in MIDI notes) between the main note and the second component of sound. Affects thickness, sense of tuning and harmony. Default: 12 Can not be changed once set Has slide options to shape changes
detune2: | Distance (in MIDI notes) between the main note and the third component of sound. Affects thickness, sense of tuning and harmony. Tiny values such as 0.1 create a thick sound. Default: 24 Can not be changed once set Has slide options to shape changes
noise: | Noise source. Has a subtle effect on the timbre of the sound. 0=pink noise (the default), 1=brown noise, 2=white noise, 3=clip noise and 4=grey noise Default: 0 Must be one of the following values: [0, 1, 2, 3, 4] May be changed whilst playing
ring: | Amount of ring in the sound. Lower values create a more rough sound, higher values produce a sound with more focus. Default: 0.2 Must be a value between 0.1 and 50 inclusively May be changed whilst playing
room: | Room size in squared metres used to calculate the reverb. Default: 70 Must be a value greater than or equal to 0.1,must be a value less than or equal to 300 Can not be changed once set
reverb_time: | How long in beats the reverb should go on for. Default: 100 Must be zero or greater Can not be changed once set

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Detuned Pulse Wave

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 100
detune: | 0.1 | pulse_width: | 0.5 | dpulse_width: | pulse_width

``

    use_synth :dpulse

A pair of detuned pulse waves passed through a low pass filter. Two pulse waves with slightly different frequencies generates a nice thick sound which can be used as a basis for some nice bass sounds. Thicken the sound by increasing the detune value, or create an octave-playing synth by choosing a detune of 12 (12 MIDI notes is an octave). Each pulse wave can also have individual widths (although the default is for the detuned pulse to mirror the width of the main pulse).

Introduced in v2.8

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 100 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
detune: | Distance (in MIDI notes) between components of sound. Affects thickness, sense of tuning and harmony. Tiny values such as 0.1 create a thick sound. Larger values such as 0.5 make the tuning sound strange. Even bigger values such as 5 create chord-like sounds. Default: 0.1 May be changed whilst playing Has slide options to shape changes
pulse_width: | The width of the pulse wave as a value between 0 and 1. A width of 0.5 will produce a square wave. Different values will change the timbre of the sound. Only valid if wave is type pulse. Default: 0.5 Must be a value between 0 and 1 exclusively May be changed whilst playing Has slide options to shape changes
dpulse_width: | The width of the second detuned pulse wave as a value between 0 and 1. A width of 0.5 will produce a square wave. Different values will change the timbre of the sound. Only valid if wave is type pulse. Default: pulse_width Must be a value between 0 and 1 exclusively May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Detuned Saw wave

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 100
detune: | 0.1

``

    use_synth :dsaw

A pair of detuned saw waves passed through a low pass filter. Two saw waves with slightly different frequencies generates a nice thick sound which is the basis for a lot of famous synth sounds. Thicken the sound by increasing the detune value, or create an octave-playing synth by choosing a detune of 12 (12 MIDI notes is an octave).

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 100 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
detune: | Distance (in MIDI notes) between components of sound. Affects thickness, sense of tuning and harmony. Tiny values such as 0.1 create a thick sound. Larger values such as 0.5 make the tuning sound strange. Even bigger values such as 5 create chord-like sounds. Default: 0.1 May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Detuned Triangle Wave

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 100
detune: | 0.1

``

    use_synth :dtri

A pair of detuned triangle waves passed through a low pass filter. Two pulse waves with slightly different frequencies generates a nice thick sound which can be used as a basis for some nice bass sounds. Thicken the sound by increasing the detune value, or create an octave-playing synth by choosing a detune of 12 (12 MIDI notes is an octave).

Introduced in v2.10

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 100 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
detune: | Distance (in MIDI notes) between components of sound. Affects thickness, sense of tuning and harmony. Tiny values such as 0.1 create a thick sound. Larger values such as 0.5 make the tuning sound strange. Even bigger values such as 5 create chord-like sounds. Default: 0.1 May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Dull Bell

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2

``

    use_synth :dull_bell

A simple dull discordant bell sound.

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Basic FM synthesis

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 100
divisor: | 2 | depth: | 1

``

    use_synth :fm

A sine wave with a fundamental frequency which is modulated at audio rate by another sine wave with a specific modulation, division and depth. Useful for generating a wide range of sounds by playing with the divisor and depth params. Great for deep powerful bass and crazy 70s sci-fi sounds.

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 100 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
divisor: | Modifies the frequency of the modulator oscillator relative to the carrier. Don’t worry too much about what this means - just try different numbers out! Default: 2 May be changed whilst playing Has slide options to shape changes
depth: | Modifies the depth of the carrier wave used to modify fundamental frequency. Don’t worry too much about what this means - just try different numbers out! Default: 1 May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Grey Noise

amp: | 1 | pan: | 0 | attack: | 0 | decay: | 0
sustain: | 0 | release: | 1 | attack_level: | 1 | decay_level: | sustain_level
sustain_level: | 1 | env_curve: | 2 | cutoff: | 110 | res: | 0

``

    use_synth :gnoise

Generates noise which results from flipping random bits in a word. The spectrum is emphasised towards lower frequencies. Useful for generating percussive sounds such as snares and hand claps. Also useful for simulating wind or sea effects.

Introduced in v2.0

## Options

amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 110 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
res: | Filter resonance as a value between 0 and 1. Large amounts of resonance (a res: near 1) can create a whistling sound around the cutoff frequency. Smaller values produce less resonance. Default: 0 Must be zero or greater,must be a value less than 1 May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Growl

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0.1
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 130
res: | 0.7

``

    use_synth :growl

A deep rumbling growl with a bright sine shining through at higher notes.

Introduced in v2.4

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0.1 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 130 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
res: | Filter resonance as a value between 0 and 1. Large amounts of resonance (a res: near 1) can create a whistling sound around the cutoff frequency. Smaller values produce less resonance. Default: 0.7 Must be zero or greater,must be a value less than 1 May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Hollow

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 90
res: | 0.99 | noise: | 1 | norm: | 0

``

    use_synth :hollow

A hollow breathy sound constructed from random noise

Introduced in v2.4

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 90 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
res: | Filter resonance as a value between 0 and 1. Only functional if a cutoff value is specified. Large amounts of resonance (a res: near 1) can create a whistling sound around the cutoff frequency. Smaller values produce less resonance. Default: 0.99 Must be zero or greater,must be a value less than 1 May be changed whilst playing Has slide options to shape changes
noise: | Noise source. Has a subtle effect on the timbre of the sound. 0=pink noise, 1=brown noise (the default), 2=white noise, 3=clip noise and 4=grey noise Default: 1 Must be one of the following values: [0, 1, 2, 3, 4] May be changed whilst playing
norm: | Normalise the audio (make quieter parts of the synth’s sound louder and louder parts quieter) - this is similar to the normaliser FX. This may emphasise any clicks caused by clipping. Default: 0 Must be one of the following values: [0, 1] May be changed whilst playing

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Hoover

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0.05
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 130
res: | 0.1

``

    use_synth :hoover

Classic early 90’s rave synth - ‘a sort of slurry chorussy synth line like the classic Dominator by Human Resource’. Based on Dan Stowell’s implementation in SuperCollider and Daniel Turczanski’s port to Overtone. Works really well with portamento (see docs for the ‘control’ method).

Introduced in v2.6

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0.05 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 130 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
res: | Filter resonance as a value between 0 and 1. Large amounts of resonance (a res: near 1) can create a whistling sound around the cutoff frequency. Smaller values produce less resonance. Default: 0.1 Must be zero or greater,must be a value less than 1 May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# SynthKalimba

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 4 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | clickiness: | 0.1

``

    use_synth :kalimba

A synthesised kalimba (a type of African thumb piano). Note that due to the plucked nature of this synth the envelope opts such as `attack:`, `sustain:` and `release:` do not work as expected. They can only shorten the natural length of the note, not prolong it. Note the default envelope is longer than usual - sustain: 4 and release: 1

Introduced in v3.3

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. With the kalimba synth, this opt can only have the effect of shortening the attack phase, not prolonging it. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). With the kalimba synth, this opt can only have the effect of controlling the amp within the natural duration of the note and can not prolong the sound. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. With the kalimba synth, this opt can only have the effect of controlling the amp within the natural duration of the note and can not prolong the sound. Default: 4 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. With the kalimba synth, this opt can only have the effect of controlling the amp within the natural duration of the note and can not prolong the sound. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
clickiness: | Ratio of percussive click to melodic note in the sound. A low clickiness like 0.1 works well - higher values might give the impression that the instrument is being played harder. Very high values (towards 1) will be louder! Default: 0.1 Must be a value between 0 and 1 inclusively Can not be changed once set

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Modulated Sine Wave

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 100
mod_phase: | 0.25 | mod_range: | 5 | mod_pulse_width: | 0.5 | mod_phase_offset: | 0
mod_invert_wave: | 0 | mod_wave: | 1

``

    use_synth :mod_beep

A sine wave passed through a low pass filter which modulates between two separate notes via a variety of control waves.

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 100 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
mod_phase: | Phase duration in beats of oscillations between the two notes. Time it takes to switch between the notes. Default: 0.25 Must be greater than zero May be changed whilst playing Has slide options to shape changes Scaled with current BPM value
mod_range: | The size of gap between modulation notes. A gap of 12 is one octave. Default: 5 May be changed whilst playing Has slide options to shape changes
mod_pulse_width: | The width of the modulated pulse wave as a value between 0 and 1. A width of 0.5 will produce a square wave. Only valid if mod wave is type pulse. Default: 0.5 Must be a value between 0 and 1 exclusively May be changed whilst playing Has slide options to shape changes
mod_phase_offset: | Initial modulation phase offset (a value between 0 and 1). Default: 0 Must be a value between 0 and 1 inclusively Can not be changed once set
mod_invert_wave: | Invert mod waveform (i.e. flip it on the y axis). 0=normal wave, 1=inverted wave. Default: 0 Must be one of the following values: [0, 1] May be changed whilst playing
mod_wave: | Wave shape of mod wave. 0=saw wave, 1=pulse, 2=triangle wave and 3=sine wave. Default: 1 Must be one of the following values: [0, 1, 2, 3] May be changed whilst playing

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Modulated Detuned Saw Waves

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 100
mod_phase: | 0.25 | mod_range: | 5 | mod_pulse_width: | 0.5 | mod_phase_offset: | 0
mod_invert_wave: | 0 | mod_wave: | 1 | detune: | 0.1

``

    use_synth :mod_dsaw

A pair of detuned saw waves (see the dsaw synth) which are modulated between two fixed notes at a given rate.

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 100 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
mod_phase: | Phase duration in beats of oscillations between the two notes. Time it takes to switch between the notes. Default: 0.25 Must be greater than zero May be changed whilst playing Has slide options to shape changes Scaled with current BPM value
mod_range: | The size of gap between modulation notes. A gap of 12 is one octave. Default: 5 May be changed whilst playing Has slide options to shape changes
mod_pulse_width: | The width of the modulated pulse wave as a value between 0 and 1. A width of 0.5 will produce a square wave. Only valid if mod wave is type pulse. Default: 0.5 Must be a value between 0 and 1 exclusively May be changed whilst playing Has slide options to shape changes
mod_phase_offset: | Initial modulation phase offset (a value between 0 and 1). Default: 0 Must be a value between 0 and 1 inclusively Can not be changed once set
mod_invert_wave: | Invert mod waveform (i.e. flip it on the y axis). 0=normal wave, 1=inverted wave. Default: 0 Must be one of the following values: [0, 1] May be changed whilst playing
mod_wave: | Wave shape of mod wave. 0=saw wave, 1=pulse, 2=triangle wave and 3=sine wave. Default: 1 Must be one of the following values: [0, 1, 2, 3] May be changed whilst playing
detune: | Distance (in MIDI notes) between components of sound. Affects thickness, sense of tuning and harmony. Tiny values such as 0.1 create a thick sound. Larger values such as 0.5 make the tuning sound strange. Even bigger values such as 5 create chord-like sounds. Default: 0.1 May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Basic FM synthesis with frequency modulation.

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 100
divisor: | 2 | depth: | 1 | mod_phase: | 0.25 | mod_range: | 5
mod_pulse_width: | 0.5 | mod_phase_offset: | 0 | mod_invert_wave: | 0 | mod_wave: | 1

``

    use_synth :mod_fm

The FM synth modulating between two notes - the duration of the modulation can be modified using the mod_phase arg, the range (number of notes jumped between) by the mod_range arg and the width of the jumps by the mod_width param. The FM synth is a sine wave with a fundamental frequency which is modulated at audio rate by another sine wave with a specific modulation, division and depth. Useful for generating a wide range of sounds by playing with the `:divisor` and `:depth` params. Great for deep powerful bass and crazy 70s sci-fi sounds.

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 100 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
divisor: | Modifies the frequency of the modulator oscillator relative to the carrier. Don’t worry too much about what this means - just try different numbers out! Default: 2 May be changed whilst playing Has slide options to shape changes
depth: | Modifies the depth of the carrier wave used to modify fundamental frequency. Don’t worry too much about what this means - just try different numbers out! Default: 1 May be changed whilst playing Has slide options to shape changes
mod_phase: | Phase duration in beats of oscillations between the two notes. Time it takes to switch between the notes. Default: 0.25 Must be greater than zero May be changed whilst playing Scaled with current BPM value
mod_range: | The size of gap between modulation notes. A gap of 12 is one octave. Default: 5 May be changed whilst playing
mod_pulse_width: | The width of the modulated pulse wave as a value between 0 and 1. A width of 0.5 will produce a square wave. Only valid if mod wave is type pulse. Default: 0.5 Must be a value between 0 and 1 exclusively May be changed whilst playing
mod_phase_offset: | Initial modulation phase offset (a value between 0 and 1). Default: 0 Must be a value between 0 and 1 inclusively Can not be changed once set
mod_invert_wave: | Invert mod waveform (i.e. flip it on the y axis). 0=normal wave, 1=inverted wave. Default: 0 Must be one of the following values: [0, 1] May be changed whilst playing
mod_wave: | Wave shape of mod wave. 0=saw wave, 1=pulse, 2=triangle wave and 3=sine wave. Default: 1 Must be one of the following values: [0, 1, 2, 3] May be changed whilst playing

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Modulated Pulse

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 100
mod_phase: | 0.25 | mod_range: | 5 | mod_pulse_width: | 0.5 | mod_phase_offset: | 0
mod_invert_wave: | 0 | mod_wave: | 1 | pulse_width: | 0.5

``

    use_synth :mod_pulse

A pulse wave with a low pass filter modulating between two notes via a variety of control waves (see mod_wave: arg). The pulse wave defaults to a square wave, but the timbre can be changed dramatically by adjusting the pulse_width arg between 0 and 1.

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 100 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
mod_phase: | Phase duration in beats of oscillations between the two notes. Time it takes to switch between the notes. Default: 0.25 Must be greater than zero May be changed whilst playing Has slide options to shape changes Scaled with current BPM value
mod_range: | The size of gap between modulation notes. A gap of 12 is one octave. Default: 5 May be changed whilst playing Has slide options to shape changes
mod_pulse_width: | The width of the modulated pulse wave as a value between 0 and 1. A width of 0.5 will produce a square wave. Only valid if mod wave is type pulse. Default: 0.5 Must be a value between 0 and 1 exclusively May be changed whilst playing Has slide options to shape changes
mod_phase_offset: | Initial modulation phase offset (a value between 0 and 1). Default: 0 Must be a value between 0 and 1 inclusively Can not be changed once set
mod_invert_wave: | Invert mod waveform (i.e. flip it on the y axis). 0=normal wave, 1=inverted wave. Default: 0 Must be one of the following values: [0, 1] May be changed whilst playing
mod_wave: | Wave shape of mod wave. 0=saw wave, 1=pulse, 2=triangle wave and 3=sine wave. Default: 1 Must be one of the following values: [0, 1, 2, 3] May be changed whilst playing
pulse_width: | The width of the pulse wave as a value between 0 and 1. A width of 0.5 will produce a square wave. Different values will change the timbre of the sound. Only valid if wave is type pulse. Default: 0.5 Must be a value between 0 and 1 exclusively May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Modulated Saw Wave

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 100
mod_phase: | 0.25 | mod_range: | 5 | mod_pulse_width: | 0.5 | mod_phase_offset: | 0
mod_invert_wave: | 0 | mod_wave: | 1

``

    use_synth :mod_saw

A saw wave passed through a low pass filter which modulates between two separate notes via a variety of control waves.

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 100 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
mod_phase: | Phase duration in beats of oscillations between the two notes. Time it takes to switch between the notes. Default: 0.25 Must be greater than zero May be changed whilst playing Has slide options to shape changes Scaled with current BPM value
mod_range: | The size of gap between modulation notes. A gap of 12 is one octave. Default: 5 May be changed whilst playing Has slide options to shape changes
mod_pulse_width: | The width of the modulated pulse wave as a value between 0 and 1. A width of 0.5 will produce a square wave. Only valid if mod wave is type pulse. Default: 0.5 Must be a value between 0 and 1 exclusively May be changed whilst playing Has slide options to shape changes
mod_phase_offset: | Initial modulation phase offset (a value between 0 and 1). Default: 0 Must be a value between 0 and 1 inclusively Can not be changed once set
mod_invert_wave: | Invert mod waveform (i.e. flip it on the y axis). 0=normal wave, 1=inverted wave. Default: 0 Must be one of the following values: [0, 1] May be changed whilst playing
mod_wave: | Wave shape of mod wave. 0=saw wave, 1=pulse, 2=triangle wave and 3=sine wave. Default: 1 Must be one of the following values: [0, 1, 2, 3] May be changed whilst playing

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Modulated Sine Wave

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 100
mod_phase: | 0.25 | mod_range: | 5 | mod_pulse_width: | 0.5 | mod_phase_offset: | 0
mod_invert_wave: | 0 | mod_wave: | 1

``

    use_synth :mod_sine

A sine wave passed through a low pass filter which modulates between two separate notes via a variety of control waves.

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 100 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
mod_phase: | Phase duration in beats of oscillations between the two notes. Time it takes to switch between the notes. Default: 0.25 Must be greater than zero May be changed whilst playing Has slide options to shape changes Scaled with current BPM value
mod_range: | The size of gap between modulation notes. A gap of 12 is one octave. Default: 5 May be changed whilst playing Has slide options to shape changes
mod_pulse_width: | The width of the modulated pulse wave as a value between 0 and 1. A width of 0.5 will produce a square wave. Only valid if mod wave is type pulse. Default: 0.5 Must be a value between 0 and 1 exclusively May be changed whilst playing Has slide options to shape changes
mod_phase_offset: | Initial modulation phase offset (a value between 0 and 1). Default: 0 Must be a value between 0 and 1 inclusively Can not be changed once set
mod_invert_wave: | Invert mod waveform (i.e. flip it on the y axis). 0=normal wave, 1=inverted wave. Default: 0 Must be one of the following values: [0, 1] May be changed whilst playing
mod_wave: | Wave shape of mod wave. 0=saw wave, 1=pulse, 2=triangle wave and 3=sine wave. Default: 1 Must be one of the following values: [0, 1, 2, 3] May be changed whilst playing

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Modulated Triangle Wave

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 100
mod_phase: | 0.25 | mod_range: | 5 | mod_pulse_width: | 0.5 | mod_phase_offset: | 0
mod_invert_wave: | 0 | mod_wave: | 1

``

    use_synth :mod_tri

A triangle wave passed through a low pass filter which modulates between two separate notes via a variety of control waves.

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 100 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
mod_phase: | Phase duration in beats of oscillations between the two notes. Time it takes to switch between the notes. Default: 0.25 Must be greater than zero May be changed whilst playing Has slide options to shape changes Scaled with current BPM value
mod_range: | The size of gap between modulation notes. A gap of 12 is one octave. Default: 5 May be changed whilst playing Has slide options to shape changes
mod_pulse_width: | The width of the modulated pulse wave as a value between 0 and 1. A width of 0.5 will produce a square wave. Only valid if mod wave is type pulse. Default: 0.5 Must be a value between 0 and 1 exclusively May be changed whilst playing Has slide options to shape changes
mod_phase_offset: | Initial modulation phase offset (a value between 0 and 1). Default: 0 Must be a value between 0 and 1 inclusively Can not be changed once set
mod_invert_wave: | Invert mod waveform (i.e. flip it on the y axis). 0=normal wave, 1=inverted wave. Default: 0 Must be one of the following values: [0, 1] May be changed whilst playing
mod_wave: | Wave shape of mod wave. 0=saw wave, 1=pulse, 2=triangle wave and 3=sine wave. Default: 1 Must be one of the following values: [0, 1, 2, 3] May be changed whilst playing

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Noise

amp: | 1 | pan: | 0 | attack: | 0 | decay: | 0
sustain: | 0 | release: | 1 | attack_level: | 1 | decay_level: | sustain_level
sustain_level: | 1 | env_curve: | 2 | cutoff: | 110 | res: | 0

``

    use_synth :noise

Noise that contains equal amounts of energy at every frequency - comparable to radio static. Useful for generating percussive sounds such as snares and hand claps. Also useful for simulating wind or sea effects.

Introduced in v2.0

## Options

amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 110 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
res: | Filter resonance as a value between 0 and 1. Large amounts of resonance (a res: near 1) can create a whistling sound around the cutoff frequency. Smaller values produce less resonance. Default: 0 Must be zero or greater,must be a value less than 1 May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# SynthPiano

note: | 52 | amp: | 1 | pan: | 0 | vel: | 0.2
attack: | 0 | decay: | 0 | sustain: | 0 | release: | 1
attack_level: | 1 | decay_level: | sustain_level | sustain_level: | 1 | hard: | 0.5
stereo_width: | 0

``

    use_synth :piano

A basic piano synthesiser. Note that due to the plucked nature of this synth the envelope opts such as `attack:`, `sustain:` and `release:` do not work as expected. They can only shorten the natural length of the note, not prolong it.

Introduced in v2.6

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, 56.5, `:C`, `:C2`, `:Eb4`, or `:Ds3`. Default: 52 Must be zero or greater,must be a value less than 231 May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
vel: | Velocity of keypress. Default: 0.2 Must be a value between 0 and 1 inclusively Can not be changed once set
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. With the piano synth, this opt can only have the effect of shortening the attack phase, not prolonging it. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). With the piano synth, this opt can only have the effect of controlling the amp within the natural duration of the note and can not prolong the sound. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. With the piano synth, this opt can only have the effect of controlling the amp within the natural duration of the note and can not prolong the sound. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. With the piano synth, this opt can only have the effect of controlling the amp within the natural duration of the note and can not prolong the sound. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
hard: | Hardness of keypress. Default: 0.5 Must be a value between 0 and 1 inclusively Can not be changed once set
stereo_width: | Width of the stereo effect (which makes low notes sound towards the left, high notes towards the right). 0 to 1. Default: 0 Must be a value between 0 and 1 inclusively Can not be changed once set

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# SynthPluck

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
sustain: | 0 | release: | 1 | attack_level: | 1 | decay: | 0
decay_level: | sustain_level | sustain_level: | 1 | noise_amp: | 0.8 | max_delay_time: | 0.125
pluck_decay: | 30 | coef: | 0.3

``

    use_synth :pluck

A basic plucked string synthesiser that uses Karplus-Strong synthesis. Note that due to the plucked nature of this synth the envelope opts such as `attack:`, `sustain:` and `release:` do not work as expected. They can only shorten the natural length of the note, not prolong it. Also, the `note:` opt will only honour whole tones.

Introduced in v2.10

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3`. Note that the piano synth can only play whole tones such as 60 and does not handle floats such as 60.3 Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. With the piano synth, this opt can only have the effect of controlling the amp within the natural duration of the note and can not prolong the sound. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. With the piano synth, this opt can only have the effect of controlling the amp within the natural duration of the note and can not prolong the sound. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). With the piano synth, this opt can only have the effect of controlling the amp within the natural duration of the note and can not prolong the sound. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
noise_amp: | Amplitude of source (pink) noise. Default: 0.8 Must be a value between 0 and 1 inclusively Can not be changed once set
max_delay_time: | Maximum length of the delay line buffer. Default: 0.125 Must be a value between 0.125 and 1 inclusively Can not be changed once set
pluck_decay: | How long the pluck takes to stabilise on a note. This doesn’t have a dramatic effect on the sound. Default: 30 Must be a value between 1 and 100 inclusively Can not be changed once set
coef: | Coefficient of the internal OnePole filter. Values around zero are resonant and bright, values towards 1 sound more dampened and cutoff. It’s a little bit like playing nearer the soundhole/fingerboard for values near zero and more toward the bridge for values approaching one, although this isn’t an exact comparison. Default: 0.3 Must be a value between -1 and 1 inclusively Can not be changed once set

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Pink Noise

amp: | 1 | pan: | 0 | attack: | 0 | decay: | 0
sustain: | 0 | release: | 1 | attack_level: | 1 | decay_level: | sustain_level
sustain_level: | 1 | env_curve: | 2 | cutoff: | 110 | res: | 0

``

    use_synth :pnoise

Noise whose spectrum falls off in power by 3 dB per octave. Useful for generating percussive sounds such as snares and hand claps. Also useful for simulating wind or sea effects.

Introduced in v2.0

## Options

amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 110 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
res: | Filter resonance as a value between 0 and 1. Large amounts of resonance (a res: near 1) can create a whistling sound around the cutoff frequency. Smaller values produce less resonance. Default: 0 Must be zero or greater,must be a value less than 1 May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Pretty Bell

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2

``

    use_synth :pretty_bell

A pretty bell sound. Works well with short attacks and long decays.

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# The Prophet

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 110
res: | 0.7

``

    use_synth :prophet

Dark and swirly, this synth uses Pulse Width Modulation (PWM) to create a timbre which continually moves around. This effect is created using the pulse ugen which produces a variable width square wave. We then control the width of the pulses using a variety of LFOs - sin-osc and lf-tri in this case. We use a number of these LFO modulated pulse ugens with varying LFO type and rate (and phase in some cases) to provide the LFO with a different starting point. We then mix all these pulses together to create a thick sound and then feed it through a resonant low pass filter (rlpf). For extra bass, one of the pulses is an octave lower (half the frequency) and its LFO has a little bit of randomisation thrown into its frequency component for that extra bit of variety.

Synth design adapted from: The Prophet Speaks (page 2) Steal This Sound, Mitchell Sigman

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 110 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
res: | Filter resonance as a value between 0 and 1. Large amounts of resonance (a res: near 1) can create a whistling sound around the cutoff frequency. Smaller values produce less resonance. Default: 0.7 Must be zero or greater,must be a value less than 1 May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Pulse Wave

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 100
pulse_width: | 0.5

``

    use_synth :pulse

A simple pulse wave with a low pass filter. This defaults to a square wave, but the timbre can be changed dramatically by adjusting the pulse_width arg between 0 and 1. The pulse wave is thick and heavy with lower notes and is a great ingredient for bass sounds.

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 100 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
pulse_width: | The width of the pulse wave as a value between 0 and 1. A width of 0.5 will produce a square wave. Different values will change the timbre of the sound. Only valid if wave is type pulse. Default: 0.5 Must be a value between 0 and 1 exclusively May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# SynthRodeo

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 1 | sustain: | 0.8 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | use_chorus: | 1 | use_compressor: | 1
cutoff: | 72

``

    use_synth :rodeo

Classic 70’s electric piano sound, with built-in compressor and chorus.

Introduced in v3.3

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0.8 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
use_chorus: | Enable the chorus effect (on by default). Default: 1 Must be one of the following values: [0, 1] Can not be changed once set
use_compressor: | Enable the compressor (on by default). Default: 1 Must be one of the following values: [0, 1] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 72 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Saw Wave

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 100

``

    use_synth :saw

A saw wave with a low pass filter. Great for using with FX such as the built in low pass filter (available via the cutoff arg) due to the complexity and thickness of the sound.

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 100 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Sine Wave

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2

``

    use_synth :sine

A simple pure sine wave. The sine wave is the simplest, purest sound there is and is the fundamental building block of all noise. The mathematician Fourier demonstrated that any sound could be built out of a number of sine waves (the more complex the sound, the more sine waves needed). Have a play combining a number of sine waves to design your own sounds!

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Sound In

amp: | 1 | pan: | 0 | attack: | 0 | decay: | 0
sustain: | 1 | release: | 0 | attack_level: | 1 | decay_level: | sustain_level
sustain_level: | 1 | env_curve: | 0 | input: | 1

``

    use_synth :sound_in

Treat sound card input as a synth. If your audio card has inputs, you may use this synth to feed the incoming audio into Sonic Pi. This synth will read in a single mono audio stream - for example from a standard microphone or guitar. See `:sound_in_stereo` for a similar synth capable of reading in a stereo signal.

As with all Sonic Pi synths, there is a default envelope which determines the duration of the lifetime of the synth. Therefore, to get a continuous stream of audio, you need to place consecutive calls to this synth in iteration or a `live_loop`. For example:

`live_loop :playback do`

`synth :sound_in, sustain: 8`

`sleep 8`

`end`

Note that if the microphone and speaker are close together (on a laptop or in a small room) you will potentially get a harsh feedback sound.

Also, note that audio in isn’t yet supported on Raspberry Pi.

Introduced in v2.10

## Options

amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 0 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
input: | Sound card input channel to obtain audio from. Indexing starts at 1 so input 1 represents the first channel, and channel 2 can be represented by `input: 2` Default: 1 Must be a value greater than or equal to 1 May be changed whilst playing

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Sound In Stereo

amp: | 1 | pan: | 0 | attack: | 0 | decay: | 0
sustain: | 1 | release: | 0 | attack_level: | 1 | decay_level: | sustain_level
sustain_level: | 1 | env_curve: | 0 | input: | 1

``

    use_synth :sound_in_stereo

Treat sound card input as a synth. If your audio card has inputs, you may use this synth to feed the incoming audio into Sonic Pi. This synth will read in a stereo audio stream - for example from a stereo microphone or external stereo keyboard. See `:sound_in` for a similar synth capable of reading in a mono signal. The stereo input is expected to be on consecutive sound card channels.

As with all Sonic Pi synths, there is a default envelope which determines the duration of the lifetime of the synth. Therefore, to get a continuous stream of audio, you need to place consecutive calls to this synth in iteration or a `live_loop`. For example:

`live_loop :playback do`

`synth :sound_in_stereo, sustain: 8`

`sleep 8`

`end`

Note that if the microphone and speaker are close together (on a laptop or in a small room) you will potentially get a harsh feedback sound.

Also, note that audio in isn’t yet supported on Raspberry Pi.

Introduced in v2.10

## Options

amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 0 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
input: | First of two consecutive sound card input channels to obtain audio from. Indexing starts at 1 so input 1 represents the first channel, and channel 2 can be represented by `input: 2` Default: 1 Must be a value greater than or equal to 1 May be changed whilst playing

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Square Wave

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 100

``

    use_synth :square

A simple square wave with a low pass filter. The square wave is thick and heavy with lower notes and is a great ingredient for bass sounds. If you wish to modulate the width of the square wave see the synth pulse.

Introduced in v2.2

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 100 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Pulse Wave with sub

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 100
pulse_width: | 0.5 | sub_amp: | 1 | sub_detune: | -12

``

    use_synth :subpulse

A pulse wave with a sub sine wave passed through a low pass filter. The pulse wave is thick and heavy with lower notes and is a great ingredient for bass sounds - especially with the sub wave.

Introduced in v2.6

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 100 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
pulse_width: | The width of the pulse wave as a value between 0 and 1. A width of 0.5 will produce a square wave. Different values will change the timbre of the sound. Only valid if wave is type pulse. Default: 0.5 Must be a value between 0 and 1 exclusively May be changed whilst playing Has slide options to shape changes
sub_amp: | Amplitude for the additional sine wave. Default: 1 May be changed whilst playing Has slide options to shape changes
sub_detune: | Amount of detune from the note for the additional sine wave. Default is -12 Default: -12 May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Supersaw

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 130
res: | 0.7

``

    use_synth :supersaw

Thick swirly saw waves sparkling and moving about to create a rich trancy sound.

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 130 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
res: | Filter resonance as a value between 0 and 1. Large amounts of resonance (a res: near 1) can create a whistling sound around the cutoff frequency. Smaller values produce less resonance. Default: 0.7 Must be zero or greater,must be a value less than 1 May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# TB-303 Emulation

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 120
cutoff_min: | 30 | cutoff_attack: | attack | cutoff_decay: | decay | cutoff_sustain: | sustain
cutoff_release: | release | cutoff_attack_level: | 1 | cutoff_decay_level: | cutoff_sustain_level | cutoff_sustain_level: | 1
res: | 0.9 | wave: | 0 | pulse_width: | 0.5

``

    use_synth :tb303

Emulation of the classic Roland TB-303 Bass Line synthesiser. Overdrive the res (i.e. use very large values) for that classic late 80s acid sound.

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | The maximum cutoff value as a MIDI note Default: 120 Must be a value less than or equal to 130 May be changed whilst playing Has slide options to shape changes
cutoff_min: | The minimum cutoff value. Default: 30 Must be a value less than or equal to 130 May be changed whilst playing Has slide options to shape changes
cutoff_attack: | Attack time for cutoff filter. Amount of time (in beats) for sound to reach full cutoff value. Default value is set to match amp envelope’s attack value. Default: attack Must be zero or greater Can not be changed once set Scaled with current BPM value
cutoff_decay: | Decay time for cutoff filter. Amount of time (in beats) for sound to move from full cutoff value (cutoff attack level) to the cutoff sustain level. Default value is set to match amp envelope’s decay value. Default: decay Must be zero or greater Can not be changed once set Scaled with current BPM value
cutoff_sustain: | Amount of time for cutoff value to remain at sustain level in beats. Default value is set to match amp envelope’s sustain value. Default: sustain Must be zero or greater Can not be changed once set Scaled with current BPM value
cutoff_release: | Amount of time (in beats) for sound to move from cutoff sustain value to cutoff min value. Default value is set to match amp envelope’s release value. Default: release Must be zero or greater Can not be changed once set Scaled with current BPM value
cutoff_attack_level: | The peak cutoff (value of cutoff at peak of attack) as a value between 0 and 1 where 0 is the :cutoff_min and 1 is the :cutoff value Default: 1 Must be a value between 0 and 1 inclusively Can not be changed once set
cutoff_decay_level: | The level of cutoff after the decay phase as a value between 0 and 1 where 0 is the :cutoff_min and 1 is the :cutoff value Default: cutoff_sustain_level Must be a value between 0 and 1 inclusively Can not be changed once set
cutoff_sustain_level: | The sustain cutoff (value of cutoff at sustain time) as a value between 0 and 1 where 0 is the :cutoff_min and 1 is the :cutoff value. Default: 1 Must be a value between 0 and 1 inclusively Can not be changed once set
res: | Filter resonance as a value between 0 and 1. Large amounts of resonance (a res: near 1) can create a whistling sound around the cutoff frequency. Smaller values produce less resonance. Default: 0.9 Must be zero or greater,must be a value less than 1 May be changed whilst playing Has slide options to shape changes
wave: | Wave type - 0 saw, 1 pulse, 2 triangle. Different waves will produce different sounds. Default: 0 Must be one of the following values: [0, 1, 2] May be changed whilst playing
pulse_width: | The width of the pulse wave as a value between 0 and 1. A width of 0.5 will produce a square wave. Different values will change the timbre of the sound. Only valid if wave is type pulse. Default: 0.5 Must be a value between 0 and 1 exclusively May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# TechSaws

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 130
res: | 0.7

``

    use_synth :tech_saws

Slightly modified supersaw implementation based on http://sccode.org/1-4YS

Introduced in v2.11

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 130 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
res: | Filter resonance as a value between 0 and 1. Large amounts of resonance (a res: near 1) can create a whistling sound around the cutoff frequency. Smaller values produce less resonance. Default: 0.7 Must be zero or greater,must be a value less than 1 May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Triangle Wave

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | env_curve: | 2 | cutoff: | 100
pulse_width: | 0.5

``

    use_synth :tri

A simple triangle wave with a low pass filter.

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
env_curve: | Select the shape of the curve between levels in the envelope. 1=linear, 2=exponential, 3=sine, 4=welch, 6=squared, 7=cubed Default: 2 Must be one of the following values: [1, 2, 3, 4, 6, 7] Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 100 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
pulse_width: | The width of the pulse wave as a value between 0 and 1. A width of 0.5 will produce a square wave. Different values will change the timbre of the sound. Only valid if wave is type pulse. Default: 0.5 Must be a value between 0 and 1 exclusively May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0

# Zawa

note: | 52 | amp: | 1 | pan: | 0 | attack: | 0
decay: | 0 | sustain: | 0 | release: | 1 | attack_level: | 1
decay_level: | sustain_level | sustain_level: | 1 | cutoff: | 100 | res: | 0.9
phase: | 1 | phase_offset: | 0 | wave: | 3 | invert_wave: | 0
range: | 24 | disable_wave: | 0 | pulse_width: | 0.5

``

    use_synth :zawa

Saw wave with oscillating timbre. Produces moving saw waves with a unique character controllable with the control oscillator (usage similar to mod synths).

Introduced in v2.0

## Options

note: | Note to play. Either a MIDI number or a symbol representing a note. For example: `30`, `52`, `:C`, `:C2`, `:Eb4`, or `:Ds3` Default: 52 Must be zero or greater May be changed whilst playing Has slide options to shape changes
amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
attack: | Amount of time (in beats) for sound to reach full amplitude (attack_level). A short attack (i.e. 0.01) makes the initial part of the sound very percussive like a sharp tap. A longer attack (i.e 1) fades the sound in gently. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
decay: | Amount of time (in beats) for the sound to move from full amplitude (attack_level) to the sustain amplitude (sustain_level). Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
sustain: | Amount of time (in beats) for sound to remain at sustain level amplitude. Longer sustain values result in longer sounds. Full length of sound is attack + decay + sustain + release. Default: 0 Must be zero or greater Can not be changed once set Scaled with current BPM value
release: | Amount of time (in beats) for sound to move from sustain level amplitude to silent. A short release (i.e. 0.01) makes the final part of the sound very percussive (potentially resulting in a click). A longer release (i.e 1) fades the sound out gently. Full length of sound is attack + decay + sustain + release. Default: 1 Must be zero or greater Can not be changed once set Scaled with current BPM value
attack_level: | Amplitude level reached after attack phase and immediately before decay phase Default: 1 Must be zero or greater Can not be changed once set
decay_level: | Amplitude level reached after decay phase and immediately before sustain phase. Defaults to sustain_level unless explicitly set Default: sustain_level Must be zero or greater Can not be changed once set
sustain_level: | Amplitude level reached after decay phase and immediately before release phase. Default: 1 Must be zero or greater Can not be changed once set
cutoff: | MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 100 Must be zero or greater,must be a value less than 131 May be changed whilst playing Has slide options to shape changes
res: | Filter resonance as a value between 0 and 1. Large amounts of resonance (a res: near 1) can create a whistling sound around the cutoff frequency. Smaller values produce less resonance. Default: 0.9 Must be zero or greater,must be a value less than 1 May be changed whilst playing Has slide options to shape changes
phase: | Phase duration in beats of timbre modulation. Default: 1 Must be greater than zero May be changed whilst playing Has slide options to shape changes Scaled with current BPM value
phase_offset: | Initial phase offset of the sync wave (a value between 0 and 1). Default: 0 Must be a value between 0 and 1 inclusively Can not be changed once set
wave: | Wave shape controlling freq sync saw wave. 0=saw wave, 1=pulse, 2=triangle wave and 3=sine wave. Default: 3 Must be one of the following values: [0, 1, 2, 3] May be changed whilst playing
invert_wave: | Invert sync freq control waveform (i.e. flip it on the y axis). 0=uninverted wave, 1=inverted wave. Default: 0 Must be one of the following values: [0, 1] May be changed whilst playing
range: | Range of the associated sync saw in MIDI notes from the main note. Modifies timbre. Default: 24 Must be a value between 0 and 90 inclusively May be changed whilst playing Has slide options to shape changes
disable_wave: | Enable and disable sync control wave (setting to 1 will stop timbre movement). Default: 0 Must be one of the following values: [0, 1] May be changed whilst playing
pulse_width: | The width of the pulse wave as a value between 0 and 1. A width of 0.5 will produce a square wave. Different values will change the timbre of the sound. Only valid if wave is type pulse. Default: 0.5 Must be a value between 0 and 1 exclusively May be changed whilst playing Has slide options to shape changes

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0