53 lines
1 KiB
Text
53 lines
1 KiB
Text
class:: PV_LocalMax
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summary:: Pass bins which are a local maximum.
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related:: Classes/FFT, Classes/IFFT, Classes/PV_MagAbove, Classes/PV_MagBelow, Classes/PV_MagClip
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categories:: UGens>FFT
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Description::
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Passes only bins whose magnitude is above a threshold and above their nearest neighbors.
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classmethods::
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method::new
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argument::buffer
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FFT buffer.
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argument::threshold
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Magnitude threshold.
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Examples::
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code::
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s.boot;
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b = Buffer.read(s, Platform.resourceDir +/+ "sounds/a11wlk01.wav");
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(
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SynthDef("help-localMax", { arg out=0;
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var in, chain;
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in = Mix.arFill(3, { LFSaw.ar(exprand(100, 500), 0, 0.1); });
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chain = FFT(LocalBuf(2048), in);
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chain = PV_LocalMax(chain, MouseX.kr(0, 50));
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Out.ar(out, 0.5 * IFFT(chain).dup);
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}).play(s);
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)
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(
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SynthDef("help-localMax2", { arg out=0, soundBufnum=2;
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var in, chain;
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in = PlayBuf.ar(1, soundBufnum, BufRateScale.kr(soundBufnum), loop: 1);
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chain = FFT(LocalBuf(2048), in);
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chain = PV_LocalMax(chain, MouseX.kr(0, 100));
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Out.ar(out, 0.1 * IFFT(chain).dup);
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}).play(s, [\soundBufnum, b]);
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)
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::
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