HelpSource/Classes/Prand.schelp

   1 class:: Prand
   2 summary:: embed values randomly chosen from a list
   3 related:: Classes/Pxrand, Classes/Pwrand
   4 categories:: Streams-Patterns-Events>Patterns>List
   5
   6 description::
   7
   8 Embed one item from the list at random for each repeat.
   9
  10 Examples::
  11
  12 code::
  13 (
  14 var a, b;
  15 a = Prand([1, 2, 3, 4, 5], 6);  // return 6 items
  16 b = a.asStream;
  17 7.do({ b.next.postln; });
  18 )
  19
  20 // return also a subpattern:
  21 (
  22 var a, b;
  23 a = Prand([1, Pseq([10, 20, 30]), 2, 3, 4, 5], 6);      // return 6 items
  24 b = a.asStream;
  25 7.do({ b.next.postln; });
  26 )
  27
  28 //Prand used as a sequence of pitches:
  29
  30 (
  31 SynthDef(\help_sinegrain,
  32         { arg out=0, freq=440, sustain=0.05;
  33                 var env;
  34                 env = EnvGen.kr(Env.perc(0.01, sustain, 0.2), doneAction:2);
  35                 Out.ar(out, SinOsc.ar(freq, 0, env))
  36         }).add;
  37 )
  38
  39 (
  40 a = Prand(#[60, 61, 63, 65, 72], inf).asStream;
  41 Routine({
  42         loop({
  43                 Synth(\help_sinegrain, [\freq, a.next.midicps]);
  44                 0.2.wait;
  45         })
  46 }).play;
  47 )
  48 ::