SuperCollider CLASSES

PV_LocalMax

Pass bins which are a local maximum.

Description

Passes only bins whose magnitude is above a threshold and above their nearest neighbors.

Class Methods

*new (buffer, threshold: 0)

From superclass: PV_MagAbove

Arguments:

buffer

FFT buffer.

threshold

Magnitude threshold.

Inherited class methods

Instance Methods

Inherited instance methods

Examples

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


(
SynthDef("help-localMax", { arg out=0;
    var in, chain;
    in = Mix.arFill(3, { LFSaw.ar(exprand(100, 500), 0, 0.1); });
    chain = FFT(LocalBuf(2048), in);
    chain = PV_LocalMax(chain, MouseX.kr(0, 50));
    Out.ar(out, 0.5 * IFFT(chain).dup);
}).play(s);
)

(
SynthDef("help-localMax2", { 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_LocalMax(chain, MouseX.kr(0, 100));
    Out.ar(out, 0.1 * IFFT(chain).dup);
}).play(s, [\soundBufnum, b]);
)