waveset

A simple time stretch by repeating cycles.

Syntax

ares waveset ain, krep [, ilen]

Initialization

ilen (optional, default=0) -- the length (in samples) of the audio signal. If ilen is set to 0, it defaults to half the given note length (p3).

Performance

ain -- the input audio signal.

krep -- the number of times the cycle is repeated.

The input is read and each complete cycle (two zero-crossings) is repeated krep times.

There is an internal buffer as the output is clearly slower that the input. Some care is taken if the buffer is too short, but there may be strange effects.

Examples

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

<CsoundSynthesizer>
<CsOptions>
; Select audio/midi flags here according to platform
-odac    ;;;realtime audio out
;-iadc    ;;;uncomment -iadc if realtime audio input is needed too
; For Non-realtime ouput leave only the line below:
; -o waveset.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

sr = 44100
ksmps = 32
nchnls = 2
0dbfs   =1

instr 1

krep init p4
asig soundin "flute.aiff"
aout waveset asig, krep
     outs aout, aout

endin
</CsInstruments>
<CsScore>

i 1 0 3 1       ;no repetitions
i 1 + 10 3      ;stretching 3 times
i 1 + 14 6      ;6 times

e
</CsScore>
</CsoundSynthesizer>

See also

Sample Playback

Credits

Author: John ffitch
February 2001

New in version 4.11