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
  31 Examples::
  32
  33 code::
  34
  35 s.boot;
  36
  37 (
  38 b = Buffer.alloc(s,2048,1);
  39 c = Buffer.read(s, Help.dir +/+ "sounds/a11wlk01.wav");
  40 )
  41
  42 (
  43 SynthDef("help-binStretch", { arg out=0, bufnum=0;
  44         var in, chain;
  45         in = LFSaw.ar(200, 0, 0.2);
  46         chain = FFT(bufnum, in);
  47         chain = PV_BinShift(chain, MouseX.kr(0.25, 4, \exponential) );
  48         Out.ar(out, 0.5 * IFFT(chain).dup);
  49 }).play(s,[\out, 0, \bufnum, b.bufnum]);
  50 )
  51
  52 (
  53 SynthDef("help-binStretch2", { arg out=0, bufnum=0, soundBufnum=2;
  54         var in, chain;
  55         in = PlayBuf.ar(1, soundBufnum, BufRateScale.kr(soundBufnum), loop: 1);
  56         chain = FFT(bufnum, in);
  57         chain = PV_BinShift(chain, MouseX.kr(0.25, 4, \exponential) );
  58         Out.ar(out, 0.5 * IFFT(chain).dup);
  59 }).play(s,[\out, 0, \bufnum, b.bufnum, \soundBufnum, c.bufnum]);
  60 )
  61
  62 (
  63 SynthDef("help-binShift", { arg out=0, bufnum=0;
  64         var in, chain;
  65         in = LFSaw.ar(200, 0, 0.2);
  66         chain = FFT(bufnum, in);
  67         chain = PV_BinShift(chain, 1, MouseX.kr(-128, 128) );
  68         Out.ar(out, 0.5 * IFFT(chain).dup);
  69 }).play(s,[\out, 0, \bufnum, b.bufnum]);
  70 )
  71
  72 (
  73 SynthDef("help-binShift2", {  arg out=0, bufnum=0, soundBufnum=2;
  74         var in, chain;
  75         in = PlayBuf.ar(1, soundBufnum, BufRateScale.kr(soundBufnum), loop: 1);
  76         chain = FFT(bufnum, in);
  77         chain = PV_BinShift(chain, 1, MouseX.kr(-128, 128) );
  78         Out.ar(out, 0.5 * IFFT(chain).dup);
  79 }).play(s,[\out, 0, \bufnum, b.bufnum, \soundBufnum, c.bufnum]);
  80 )
  81
  82 ::
  83