SuperCollider CLASSES

PV_MagShift

shift and stretch magnitude bin position.

Description

Shift and stretch the positions of only the magnitude of the bins. Can be used as a very crude frequency shifter/scaler.

Class Methods

*new (buffer, stretch: 1, shift: 0)

Arguments:

buffer

FFT buffer.

stretch

Scale bin location by factor.

shift

Add an offset to bin position.

Inherited class methods

Instance Methods

Inherited instance methods

Examples

s.boot;
b = Buffer.read(s, Platform.resourceDir +/+ "sounds/a11wlk01.wav");

(
SynthDef("help-magStretch", { arg out=0, bufnum=0;
    var in, chain;
    in = LFSaw.ar(200, 0, 0.2);
    chain = FFT(LocalBuf(2048), in);
    chain = PV_MagShift(chain, MouseX.kr(0.25, 4, \exponential) );
    Out.ar(out, 0.1 * IFFT(chain).dup);
}).play(s);
)

(
SynthDef("help-magStretch2", { arg out=0, soundBufnum=2;
    var in, chain;
    in = PlayBuf.ar(1, soundBufnum, BufRateScale.kr(soundBufnum), loop: 1);
    chain = FFT(LocalBuf(2048), in);
    chain = PV_MagShift(chain, MouseX.kr(0.25, 4, \exponential) );
    Out.ar(out, 0.1 * IFFT(chain).dup);
}).play(s, [\soundBufnum, b]);
)

(
SynthDef("help-magShift", { arg out=0;
    var in, chain;
    in = LFSaw.ar(200, 0, 0.2);
    chain = FFT(LocalBuf(2048), in);
    chain = PV_MagShift(chain, 1, MouseX.kr(-128, 128) );
    Out.ar(out, 0.1 * IFFT(chain).dup);
}).play(s);
)

(
SynthDef("help-magShift2", {  arg out=0, soundBufnum=2;
    var in, chain;
    in = PlayBuf.ar(1, soundBufnum, BufRateScale.kr(soundBufnum), loop: 1);
    chain = FFT(LocalBuf(2048), in);
    chain = PV_MagShift(chain, 1, MouseX.kr(-128, 128) );
    Out.ar(out, 0.1 * IFFT(chain).dup);
}).play(s, [\soundBufnum, b]);
)