vaget
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## vaget

vaget — Access values of the current buffer of an a-rate variable by indexing.

## Description

Access values of the current buffer of an a-rate variable by indexing. Useful for doing sample-by-sample manipulation at k-rate without using setksmps 1.

| Note
Because this opcode does not do any bounds checking, the user must be careful not to try to read values past ksmps (the size of a buffer for an a-rate variable) by using index values greater than ksmps.

## Syntax

    kval vaget kndx, avar

## Performance

kval - value read from avar

kndx - index of the sample to read from the current buffer of the given avar variable

avar - a-rate variable to read from

## Examples

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

Example 872. Example of the vaget 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           -iadc     -d     ;;;RT audio I/O
    ; For Non-realtime ouput leave only the line below:
    ; -o avarget.wav -W ;;; for file output any platform
    </CsOptions>
    <CsInstruments>
    sr=44100
    ksmps=16
    nchnls=2

    	instr 1	; Sqrt Signal
    ifreq = (p4 > 15 ? p4 : cpspch(p4))
    iamp = ampdb(p5)

    aout init 0
    ksampnum init 0

    kenv	linseg 0, p3 * .5, 1, p3 * .5, 0

    aout1	vco2	1, ifreq
    aout2	vco2	.5, ifreq * 2
    aout3	vco2	.2, ifreq * 4

    aout	sum 	aout1, aout2, aout3

    ;Take Sqrt of signal, checking for negatives
    kcount = 0

    loopStart:

    	kval vaget kcount,aout

    	if (kval > .0) then
    		kval = sqrt(kval)
    	elseif (kval < 0) then
    		kval = sqrt(-kval) * -1
    	else
    		kval = 0
    	endif

    	vaset kval, kcount,aout

    loop_lt kcount, 1, ksmps, loopStart

    aout = aout * kenv

    aout	moogladder aout, 8000, .1

    aout = aout * iamp

    outs aout, aout
    	endin

    </CsInstruments>
    <CsScore>

    i1	0.0	2 440 80
    e

    </CsScore>
    </CsoundSynthesizer>

## See Also

vaset

## Credits

Author: Steven Yi

New in version 5.04

September 2006.

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