Help/Streams-Patterns-Events/Patterns/Prorate.html

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  28 <p class="p1"><span class="s1"><b>Prorate</b></span><span class="s2"><span class="Apple-tab-span">      </span><span class="Apple-tab-span">    </span></span><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><b>divide stream proportionally</b></p>
  29 <p class="p2"><br></p>
  30 <p class="p3"><span class="s3">superclass: <a href="FilterPattern.html"><span class="s4">FilterPattern</span></a></span></p>
  31 <p class="p2"><br></p>
  32 <p class="p2"><br></p>
  33 <p class="p1"><b>*new(proportions, pattern)</b></p>
  34 <p class="p2"><span class="Apple-tab-span">     </span></p>
  35 <p class="p1"><span class="Apple-tab-span">     </span><b>proportions</b>: <span class="Apple-tab-span">        </span>a pattern that returns either numbers (divides the pattern into pairs)</p>
  36 <p class="p1"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span>or arrays of size n which are used to split up the input into n parts.</p>
  37 <p class="p1"><span class="Apple-tab-span">     </span><b>pattern</b>:<span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>a numerical pattern</p>
  38 <p class="p2"><span class="Apple-tab-span">     </span></p>
  39 <p class="p4"><br></p>
  40 <p class="p4"><br></p>
  41 <p class="p5">// examples:</p>
  42 <p class="p6"><br></p>
  43 <p class="p4"><br></p>
  44 <p class="p5">// divide 1 into various proportions</p>
  45 <p class="p7">(</p>
  46 <p class="p7">a = <span class="s5">Prorate</span>(<span class="s5">Pseq</span>([0.35, 0.5, 0.8]), 1);</p>
  47 <p class="p6"><br></p>
  48 <p class="p7">x = a.asStream;</p>
  49 <p class="p6"><br></p>
  50 <p class="p7">x.nextN(8)</p>
  51 <p class="p7">)</p>
  52 <p class="p6"><br></p>
  53 <p class="p5">// divide a pattern into various proportions</p>
  54 <p class="p7">(</p>
  55 <p class="p7">a = <span class="s5">Prorate</span>(<span class="s5">Pseq</span>([0.35, 0.5, 0.8]), <span class="s5">Prand</span>([20, 1], <span class="s5">inf</span>));</p>
  56 <p class="p6"><br></p>
  57 <p class="p7">x = a.asStream;</p>
  58 <p class="p6"><br></p>
  59 <p class="p7">x.nextN(8)</p>
  60 <p class="p7">)</p>
  61 <p class="p6"><br></p>
  62 <p class="p6"><br></p>
  63 <p class="p5">// divide 1 into several parts</p>
  64 <p class="p7">(</p>
  65 <p class="p7">a = <span class="s5">Prorate</span>(<span class="s5">Pseq</span>([[1, 2], [5, 7], [4, 8, 9]]).collect(<span class="s5">_</span>.normalizeSum), 1);</p>
  66 <p class="p6"><br></p>
  67 <p class="p7">x = a.asStream;</p>
  68 <p class="p6"><br></p>
  69 <p class="p7">x.nextN(8)</p>
  70 <p class="p7">)</p>
  71 <p class="p6"><br></p>
  72 <p class="p5">// sound example</p>
  73 <p class="p6"><br></p>
  74 <p class="p7">(</p>
  75 <p class="p8"><span class="s5">SynthDef</span><span class="s3">(</span>\help_sinegrain<span class="s3">,<span class="Apple-converted-space"> </span></span></p>
  76 <p class="p7"><span class="Apple-tab-span">     </span>{ <span class="s5">arg</span> out=0, freq=440, sustain=0.05;</p>
  77 <p class="p7"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s5">var</span> env;</p>
  78 <p class="p7"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>env = <span class="s5">EnvGen</span>.kr(<span class="s5">Env</span>.perc(0.01, sustain, 0.2), doneAction:2);</p>
  79 <p class="p7"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s5">Out</span>.ar(out, <span class="s5">SinOsc</span>.ar(freq, 0, env))</p>
  80 <p class="p7"><span class="Apple-tab-span">     </span>}).add;</p>
  81 <p class="p7">)</p>
  82 <p class="p6"><br></p>
  83 <p class="p6"><br></p>
  84 <p class="p7">(</p>
  85 <p class="p7"><span class="s5">var</span> a, x;</p>
  86 <p class="p9"><span class="s3">a = </span>Prorate<span class="s3">(</span></p>
  87 <p class="p7"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s5">Prand</span>([2/3, 1/3, [0.3, 0.3, 0.4], [0.6, 0.4]], <span class="s5">inf</span>),</p>
  88 <p class="p7"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s5">Pseq</span>([1, 2, 1, 3, 12], <span class="s5">inf</span>)</p>
  89 <p class="p7">);</p>
  90 <p class="p6"><br></p>
  91 <p class="p7">3.do {</p>
  92 <p class="p7"><span class="Apple-tab-span">     </span>{</p>
  93 <p class="p7"><span class="Apple-tab-span">     </span><span class="s5">var</span> x = a.asStream;</p>
  94 <p class="p7"><span class="Apple-tab-span">     </span><span class="s5">var</span> freq = rrand(72, 84).midicps;</p>
  95 <p class="p7"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>loop {</p>
  96 <p class="p8"><span class="s3"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></span><span class="s5">Synth</span><span class="s3">(</span>\help_sinegrain<span class="s3">, [</span>\freq<span class="s3">, freq]);</span></p>
  97 <p class="p7"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span>(0.25 * x.next).wait;</p>
  98 <p class="p7"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>}</p>
  99 <p class="p7"><span class="Apple-tab-span">     </span>}.fork;</p>
 100 <p class="p7">};</p>
 101 <p class="p7">)</p>
 102 <p class="p6"><br></p>
 103 <p class="p6"><br></p>
 104 <p class="p6"><br></p>
 105 <p class="p6"><br></p>
 106 <p class="p6"><br></p>
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