trigexpseg
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## trigexpseg

trigexpseg — Triggers a series of exponential segments between specified points.

## Description

Triggers a series of exponential segments between specified points.

## Syntax

    ares trigexpseg kTrig, ia, idur1, ib [, idur2] [, ic] [...]

    kres trigexpseg kTrig, ia, idur1, ib [, idur2] [, ic] [...]

## Initialization

ia -- starting value. Zero is illegal for exponentials.

ib, ic, etc. -- value after dur1 seconds, etc. For exponentials, must be non-zero and must agree in sign with ia.

idur1 -- duration in seconds of first segment

idur2, idur3, etc. -- duration in seconds of subsequent segments.

## Performance

kTrig -- trigger value. Will trigger playback of envelop when kTrig is equal 1

These units generate control or audio signals whose values can pass through 2 or more specified points. The sum of dur values may or may not equal the instrument's performance time: a shorter performance will truncate the specified pattern. Triggering the envelop while it is already playing will cause the envelop to jump to the start and play again. This might cause a pop or a click. It is best to wait till the envelope has ended before retriggering it.

## Examples

Here is an example of the trigexpseg opcode. It uses the file trigexpseg.csd.

Example 1119. Example of the trigexpseg opcode.

See the sections Real-time Audio and Command Line Flags for more information on using command line flags.

    <CsoundSynthesizer>
    <CsOptions>
    ; Select audio/midi flags here according to platform
    ; Audio out   Audio in    No messages
    -odac 	-d    -m0d     -M0  -+rtmidi=virtual ;;;RT audio I/O with MIDI in
    ; For Non-realtime ouput leave only the line below:
    ; -o midiin.wav -W ;;; for file output any platform
    </CsOptions>
    <CsInstruments>
    sr = 44100
    ksmps = 32
    nchnls = 2
    0dbfs = 1

    instr 1
    aEnv expseg 0.0001, .2, 1, .2, .5, .2, .7, .2, 0.0001
    a1 oscili aEnv, 400
    outs a1, a1
    endin

    instr 2
    kTrig metro 1
    aEnv trigexpseg kTrig, 0.0001, .2, 1, .2, .5, .2, .7, .2, 0.0001
    a1 oscili aEnv, 400
    outs a1, a1
    endin

    </CsInstruments>
    <CsScore>
    i1 0 1
    i2 3 8
    </CsScore>
    </CsoundSynthesizer>

## See Also

expon, expsega, expsegr, line, linseg, linseg, linsegr, transeg

## Credits

Author: Rory Walsh
2021

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