PV_MagShift | SuperCollider 3.13.0 Help

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

PV_MagShift.new(buffer, stretch: 1.0, shift: 0.0)

Arguments:

buffer	FFT buffer.
stretch	Scale bin location by factor.
shift	Add an offset to bin position.

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]);
)

helpfile source: https://github.com/supercollider/supercollider/tree/3.13/HelpSource/Classes/PV_MagShift.schelp
link::Classes/PV_MagShift::

PV_MagShift : PV_ChainUGen : WidthFirstUGen : UGen : AbstractFunction : Object

Description

Class Methods

PV_MagShift.new(buffer, stretch: 1.0, shift: 0.0)

Arguments:

Inherited class methods

Instance Methods

Inherited instance methods

Examples