HelpSource/Classes/LFDNoise3.schelp

   1 class:: LFDNoise3
   2 summary:: Dynamic cubic noise
   3 related:: Classes/LFClipNoise, Classes/LFDClipNoise, Classes/LFDNoise0, Classes/LFDNoise1, Classes/LFNoise0, Classes/LFNoise1, Classes/LFNoise2
   4 categories::  UGens>Generators>Stochastic
   5
   6
   7 Description::
   8
   9 Similar to  link::Classes/LFNoise2:: , it generates polynomially
  10 interpolated random values at a rate given by the
  11 code::freq::  argument, with 3 differences:
  12 list::
  13 ## no time quantization
  14 ## fast recovery from low freq values footnote::
  15 link::Classes/LFNoise0:: ,  link::Classes/LFNoise1::  and
  16 link::Classes/LFNoise2::  quantize to the nearest integer division
  17 of the samplerate, and they poll the  code::freq::
  18 argument only when scheduled; thus they often seem to hang
  19 when freqs get very low.
  20 ::
  21 ## cubic instead of quadratic interpolation
  22 ::
  23
  24 If you don't need very high or very low freqs, or use fixed freqs,
  25 link::Classes/LFNoise2::  is more efficient.
  26
  27
  28 classmethods::
  29
  30 method::ar, kr
  31
  32 argument::freq
  33 Approximate rate at which to generate random values.
  34
  35 argument::mul
  36 Output will be multiplied by this value.
  37
  38 argument::add
  39 This value will be added to the output.
  40
  41 Examples::
  42
  43 code::
  44 // try wiggling mouse quickly:
  45 // LFNoise2 overshoots when going from high to low freqs, LFDNoise changes smoothly.
  46
  47 {  SinOsc.ar(LFNoise2.ar(MouseX.kr(0.1, 1000, 1), 200, 500), 0, 0.2)  }.play
  48
  49 {  SinOsc.ar(LFDNoise3.ar(MouseX.kr(0.1, 1000, 1), 200, 500), 0, 0.2)  }.play
  50
  51
  52 // LFNoise quantizes time steps at high freqs, LFDNoise does not:
  53
  54 { LFNoise2.ar(XLine.kr(2000, 20000, 8), 0.1) }.scope;
  55
  56 { LFDNoise3.ar(XLine.kr(2000, 20000, 8), 0.1) }.scope;
  57
  58 // use as frequency control
  59 (
  60 {
  61                 SinOsc.ar(
  62                         LFDNoise3.ar(4, 400, 450),
  63                         0, 0.2
  64                 )
  65 }.play;
  66 )
  67 ::
  68