vexpseg
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## vexpseg

vexpseg — Vectorial envelope generator

## Description

Generate exponential vectorial segments

## Syntax

    vexpseg  ifnout, ielements, ifn1, idur1, ifn2 [, idur2, ifn3 [...]]

## Initialization

ifnout - number of table hosting output vectorial signal

ifn1 - starting vector

ifn2, ifn3,etc. - vector after idurx seconds

idur1 - duration in seconds of first segment.

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

ielements - number of elements of vectors.

## Performance

These opcodes are similar to linseg and expseg, but operate with vectorial signals instead of with scalar signals.

Output is a vectorial control signal hosted by ifnout (that must be previously allocated), while each break-point of the envelope is actually a vector of values. All break-points must contain the same number of elements (ielements).

All these operators are designed to be used together with other opcodes that operate with vectorial signals such as>, vcella, adsynt, adsynt2, etc.

## Example

Here is an example of the vexpseg opcode. It uses the files vexpseg.csd.

Example 1179. Example of the vexpseg opcode.

    <CsoundSynthesizer>
    <CsOptions>
    -odac -B441 -b441
    </CsOptions>
    <CsInstruments>

    sr=44100
    ksmps=10
    nchnls=2

    gilen init 32

    gitable1 ftgen 0, 0, gilen, 10, 1
    gitable2 ftgen 0, 0, gilen, 10, 1

    gitable3 ftgen 0, 0, gilen, -7, 30, gilen, 35
    gitable4 ftgen 0, 0, gilen, -7, 400, gilen, 450
    gitable5 ftgen 0, 0, gilen, -7, 5000, gilen, 5500

    instr 1
    vcopy gitable2, gitable1, gilen
    turnoff
    endin

    instr 2
    vexpseg gitable2, 16, gitable3, 2, gitable4, 2, gitable5
    endin

    instr 3
    kcount init 0
    if kcount < 16 then
    	kval table kcount, gitable2
    	printk 0,kval
    	kcount = kcount +1
    else
    turnoff
    endif

    endin

    </CsInstruments>
    <CsScore>
    i1 0 1
    s
    i2 0 10
    i3 0 1
    i3 1 1
    i3 1.5 1
    i3 2 1
    i3 2.5 1
    i3 3 1
    i3 3.5 1
    i3 4 1
    i3 4.5 1

    </CsScore>
    </CsoundSynthesizer>

## Credits

Written by Gabriel Maldonado.

Example by Andres Cabrera.

New in Csound 5 (Previously available only on CsoundAV)

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