HelpSource/Classes/PV_BinShift.schelp

   1 class:: PV_BinShift
   2 summary:: Shift and stretch bin position.
   3 related:: Classes/FFT, Classes/IFFT, Classes/PV_MagShift
   4 categories:: UGens>FFT
   5
   6 Description::
   7
   8 Shift and scale the positions of the bins. Can be used as a very crude
   9 frequency shifter/scaler.
  10
  11
  12 classmethods::
  13
  14 method::new
  15
  16 argument::buffer
  17
  18 FFT buffer.
  19
  20
  21 argument::stretch
  22
  23 Scale bin location by factor.
  24
  25
  26 argument::shift
  27
  28 Add an offset to bin position.
  29
  30 argument::interp
  31
  32 Set to 0 (default) for no interpolation, or 1 to linear-interpolate between bins.
  33
  34
  35 Examples::
  36
  37 code::
  38
  39 s.boot;
  40
  41 (
  42 c = Buffer.read(s, Platform.resourceDir +/+ "sounds/a11wlk01.wav");
  43 )
  44
  45 (
  46 SynthDef("help-binStretch", { arg out=0;
  47         var in, chain;
  48         in = LFSaw.ar(200, 0, 0.2);
  49         chain = FFT(LocalBuf(2048), in);
  50         chain = PV_BinShift(chain, MouseX.kr(0.25, 4, \exponential) );
  51         Out.ar(out, 0.5 * IFFT(chain).dup);
  52 }).play;
  53 )
  54
  55 (
  56 SynthDef("help-binStretch2", { arg out=0, soundBufnum=2;
  57         var in, chain;
  58         in = PlayBuf.ar(1, soundBufnum, BufRateScale.kr(soundBufnum), loop: 1);
  59         chain = FFT(LocalBuf(2048), in);
  60         chain = PV_BinShift(chain, MouseX.kr(0.25, 4, \exponential) );
  61         Out.ar(out, 0.5 * IFFT(chain).dup);
  62 }).play(s,[\out, 0, \soundBufnum, c.bufnum]);
  63 )
  64
  65 (
  66 SynthDef("help-binShift", { arg out=0, bufnum=0;
  67         var in, chain;
  68         in = LFSaw.ar(200, 0, 0.2);
  69         chain = FFT(LocalBuf(2048), in);
  70         chain = PV_BinShift(chain, 1, MouseX.kr(-128, 128) );
  71         Out.ar(out, 0.5 * IFFT(chain).dup);
  72 }).play;
  73 )
  74
  75 (
  76 SynthDef("help-binShift2", {  arg out=0, soundBufnum=2;
  77         var in, chain;
  78         in = PlayBuf.ar(1, soundBufnum, BufRateScale.kr(soundBufnum), loop: 1);
  79         chain = FFT(LocalBuf(2048), in);
  80         chain = PV_BinShift(chain, 1, MouseX.kr(-128, 128) );
  81         Out.ar(out, 0.5 * IFFT(chain).dup);
  82 }).play(s,[\out, 0, \soundBufnum, c.bufnum]);
  83 )
  84
  85 ::
  86