interpreter/preprocessor/faust-0.9.47mr3/examples/pitch_shifter.dsp

   1 declare name            "pitch-shifter";
   2 declare version         "1.0";
   3 declare author          "Grame";
   4 declare license         "BSD";
   5 declare copyright       "(c)GRAME 2006";
   6
   7  //----------------------------
   8  // very simple real time pitch shifter
   9  //----------------------------
  10
  11 import("music.lib");
  12
  13 transpose (w, x, s, sig)  =
  14         fdelay1s(d,sig)*fmin(d/x,1) + fdelay1s(d+w,sig)*(1-fmin(d/x,1))
  15                 with {
  16                         i = 1 - pow(2, s/12);
  17                         d = i : (+ : +(w) : fmod(_,w)) ~ _;
  18                 };
  19
  20 pitchshifter = vgroup("Pitch Shifter", transpose(
  21                                                                         hslider("window (samples)", 1000, 50, 10000, 1),
  22                                                                         hslider("xfade (samples)", 10, 1, 10000, 1),
  23                                                                         hslider("shift (semitones) ", 0, -12, +12, 0.1)
  24                                                                   )
  25                                 );
  26
  27
  28 process = pitchshifter;