82 lines
1.5 KiB
Text
82 lines
1.5 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{PV_MagBelow}
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Pass bins below a threshold.@section{related}
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Classes/FFT, Classes/IFFT, Classes/PV_MagAbove, Classes/PV_LocalMax, Classes/PV_MagClip
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@section{categories}
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UGens>FFT
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@section{description}
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Passes only bins whose magnitude is below a threshold.
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@section{classmethods}
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@section{method}
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new
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@section{argument}
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buffer
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FFT buffer.
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@section{argument}
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threshold
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Magnitude threshold.
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@section{Examples}
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@racketblock[
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s.boot;
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(
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b = Buffer.alloc(s,2048,1);
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c = Buffer.read(s, Platform.resourceDir +/+ "sounds/a11wlk01.wav");
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)
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(
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SynthDef("help-magBelow", { arg out=0, bufnum=0;
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var in, chain;
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in = SinOsc.ar(SinOsc.kr(SinOsc.kr(0.08, 0, 6, 6.2).squared, 0, 100, 800));
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chain = FFT(bufnum, in);
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chain = PV_MagBelow(chain, 10);
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Out.ar(out, 0.5 * IFFT(chain).dup);
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}).play(s,[\out, 0, \bufnum, b.bufnum]);
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)
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(
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SynthDef("help-magBelow2", { arg out=0, bufnum=0;
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var in, chain;
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in = WhiteNoise.ar(0.2);
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chain = FFT(bufnum, in);
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chain = PV_MagBelow(chain, MouseX.kr(0, 7));
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Out.ar(out, 0.5 * IFFT(chain).dup);
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}).play(s,[\out, 0, \bufnum, b.bufnum]);
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)
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(
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SynthDef("help-magBelow3", { arg out=0, bufnum=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(bufnum, in);
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chain = PV_MagBelow(chain, MouseX.kr(0, 310));
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Out.ar(out, 0.5 * IFFT(chain).dup);
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}).play(s,[\out, 0, \bufnum, b.bufnum, \soundBufnum, c.bufnum]);
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)
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::
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]
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