HelpSource/Classes/PV_MagBelow.schelp

   1 class:: PV_MagBelow
   2 summary:: Pass bins below a threshold.
   3 related:: Classes/FFT, Classes/IFFT, Classes/PV_MagAbove, Classes/PV_LocalMax, Classes/PV_MagClip
   4 categories:: UGens>FFT
   5
   6 Description::
   7
   8 Passes only bins whose magnitude is below 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
  31 (
  32 b = Buffer.alloc(s,2048,1);
  33 c = Buffer.read(s, Platform.resourceDir +/+ "sounds/a11wlk01.wav");
  34 )
  35
  36 (
  37 SynthDef("help-magBelow", { arg out=0, bufnum=0;
  38         var in, chain;
  39         in = SinOsc.ar(SinOsc.kr(SinOsc.kr(0.08, 0, 6, 6.2).squared, 0, 100, 800));
  40         chain = FFT(bufnum, in);
  41         chain = PV_MagBelow(chain, 10);
  42         Out.ar(out, 0.5 * IFFT(chain).dup);
  43 }).play(s,[\out, 0, \bufnum, b.bufnum]);
  44 )
  45
  46 (
  47 SynthDef("help-magBelow2", { arg out=0, bufnum=0;
  48         var in, chain;
  49         in = WhiteNoise.ar(0.2);
  50         chain = FFT(bufnum, in);
  51         chain = PV_MagBelow(chain, MouseX.kr(0, 7));
  52         Out.ar(out, 0.5 * IFFT(chain).dup);
  53 }).play(s,[\out, 0, \bufnum, b.bufnum]);
  54 )
  55
  56 (
  57 SynthDef("help-magBelow3", { arg out=0, bufnum=0, soundBufnum=2;
  58         var in, chain;
  59         in = PlayBuf.ar(1, soundBufnum, BufRateScale.kr(soundBufnum), loop: 1);
  60         chain = FFT(bufnum, in);
  61         chain = PV_MagBelow(chain, MouseX.kr(0, 310));
  62         Out.ar(out, 0.5 * IFFT(chain).dup);
  63 }).play(s,[\out, 0, \bufnum, b.bufnum, \soundBufnum, c.bufnum]);
  64 )
  65
  66 ::
  67