HelpSource/Classes/Ppatmod.schelp

   1 class:: Ppatmod
   2 summary:: modify a given pattern before passing it into the stream
   3 related:: Classes/Plazy
   4 categories:: Streams-Patterns-Events>Patterns>Filter
   5
   6 ClassMethods::
   7
   8 method::new
   9
  10 argument::pattern
  11 the pattern.
  12
  13 argument::func
  14 A link::Classes/Function:: that modifies the enclosed pattern and embeds it in the stream.
  15
  16 argument::repeats
  17 the number of repeats.
  18
  19 Examples::
  20
  21 code::
  22 (
  23 a = Ppatmod(
  24         Pseq([0, 0, 0, 0],1),
  25         { arg pat, i;
  26                 var list;
  27                 list = pat.list;
  28                 pat.list = list.put(list.size.rand, 2);
  29         }, inf);
  30
  31 x = a.asStream;
  32 30.do({ x.next.postln });
  33 )
  34
  35
  36 //Ppatmod used to modify a pattern that produces a sequence of pitches:
  37
  38 (
  39 SynthDef(\help_sinegrain,
  40         { arg out=0, freq=440, sustain=0.05;
  41                 var env;
  42                 env = EnvGen.kr(Env.perc(0.01, sustain, 0.2), doneAction:2);
  43                 Out.ar(out, SinOsc.ar(freq, 0, env))
  44         }).add;
  45 )
  46
  47 (
  48 a = Pn(
  49         Ppatmod(
  50                 Pseq([0, 0, 0, 0],1),
  51                 { arg pat, i;
  52                         var list;
  53                         list = pat.list;
  54                         pat.list = list.put(list.size.rand, 2);
  55                 }, 15),
  56 inf).asStream;
  57
  58 Routine({
  59         loop({
  60                 Synth(\help_sinegrain, [\freq, (a.next*5+77).midicps]);
  61                 0.13.wait;
  62         })
  63 }).play;
  64 )
  65 ::