HelpSource/Classes/PV_MagAbove.schelp

   1 class:: PV_MagAbove
   2 summary:: Pass bins above a threshold.
   3 related:: Classes/FFT, Classes/IFFT, Classes/PV_LocalMax, Classes/PV_MagBelow, Classes/PV_MagClip
   4 categories:: UGens>FFT
   5
   6 Description::
   7
   8 Passes only bins whose magnitude is above a threshold.
   9
  10
  11 classmethods::
  12
  13 method::new
  14
  15 argument::buffer
  16
  17 FFT buffer.
  18
  19
  20 argument::threshold
  21
  22 Magnitude threshold.
  23
  24
  25 Examples::
  26
  27 code::
  28
  29 s.boot;
  30 b = Buffer.read(s, Help.dir +/+ "sounds/a11wlk01.wav");
  31
  32
  33 (
  34 SynthDef("help-magAbove", { arg out=0;
  35         var in, chain;
  36         in = SinOsc.ar(SinOsc.kr(SinOsc.kr(0.08, 0, 6, 6.2).squared, 0, 100, 800));
  37         //in = WhiteNoise.ar(0.2);
  38         chain = FFT(LocalBuf(2048), in);
  39         chain = PV_MagAbove(chain, 310);
  40         Out.ar(out, 0.1 * IFFT(chain).dup);
  41 }).play(s);
  42 )
  43
  44 (
  45 SynthDef("help-magAbove2", { arg out=0;
  46         var in, chain;
  47         in = WhiteNoise.ar(0.2);
  48         chain = FFT(LocalBuf(2048), in);
  49         chain = PV_MagAbove(chain, MouseX.kr(0, 10));
  50         Out.ar(out, 0.1 * IFFT(chain).dup);
  51 }).play(s);
  52 )
  53
  54 (
  55 SynthDef("help-magAbove3", { arg out=0, soundBufnum=2;
  56         var in, chain;
  57         in = PlayBuf.ar(1, soundBufnum, BufRateScale.kr(soundBufnum), loop: 1);
  58         chain = FFT(LocalBuf(2048), in);
  59         chain = PV_MagAbove(chain, MouseX.kr(0, 310));
  60         Out.ar(out, 0.1 * IFFT(chain).dup);
  61 }).play(s, [\soundBufnum, b]);
  62 )
  63
  64 ::