Help/UGens/Synth control/Envelopes/DetectSilence.html

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  28 <p class="p1"><span class="s1"><b>DetectSilence<span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></b></span><b>when input falls below a threshhold, evaluate doneAction</b></p>
  29 <p class="p2"><br></p>
  30 <p class="p3"><b>superclass: UGen</b></p>
  31 <p class="p4"><b><span class="Apple-tab-span">  </span></b></p>
  32 <p class="p3"><b>*ar(input, amp, time, doneAction)<span class="Apple-converted-space"> </span></b></p>
  33 <p class="p3"><b>*kr(input, amp, time, doneAction)<span class="Apple-converted-space"> </span></b></p>
  34 <p class="p4"><br></p>
  35 <p class="p4"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span></p>
  36 <p class="p5"><span class="Apple-tab-span">     </span><b>input</b> - any source</p>
  37 <p class="p5"><span class="Apple-tab-span">     </span><b>amp</b> - when input falls below this, evaluate doneAction</p>
  38 <p class="p5"><span class="Apple-tab-span">     </span><b>time</b><span class="Apple-tab-span"> </span>- the minimum duration of the for which input must fall below thresh before this triggers. The default is 0.1 seconds.</p>
  39 <p class="p5"><span class="Apple-tab-span">     </span><b>doneAction</b> - an integer representing a done action. See <a href="UGen-doneActions.html"><span class="s2">UGen-doneActions</span></a> for more detail.</p>
  40 <p class="p4"><br></p>
  41 <p class="p4"><br></p>
  42 <p class="p3">If the signal input starts with silence at the beginning of the synth's duration, then DetectSilence will wait indefinitely until the first sound before starting to monitor for silence.<span class="Apple-converted-space"> </span></p>
  43 <p class="p4"><br></p>
  44 <p class="p3">This UGen outputs 1 if silence is detected, otherwise 0.<span class="Apple-converted-space"> </span></p>
  45 <p class="p4"><br></p>
  46 <p class="p6"><span class="s3"><span class="Apple-tab-span">    </span></span>//example</p>
  47 <p class="p7"><span class="Apple-tab-span">     </span></p>
  48 <p class="p8"><span class="Apple-tab-span">     </span>(</p>
  49 <p class="p9"><span class="s3"><span class="Apple-tab-span">    </span></span><span class="s4">SynthDef</span><span class="s3">(</span>"detectSilence-help"<span class="s3">, { </span><span class="s4">arg</span><span class="s3"> out;</span></p>
  50 <p class="p8"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>var z;</p>
  51 <p class="p8"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>z = SinOsc.ar(Rand(400, 700), 0, LFNoise2.kr(8, 0.2).max(0));</p>
  52 <p class="p8"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>DetectSilence.ar(z, doneAction:2);</p>
  53 <p class="p8"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s4">Out</span>.ar(out, <span class="s4">z</span>);</p>
  54 <p class="p8"><span class="Apple-tab-span">     </span>}).send(s);</p>
  55 <p class="p8"><span class="Apple-tab-span">     </span>)</p>
  56 <p class="p7"><span class="Apple-tab-span">     </span></p>
  57 <p class="p9"><span class="s3"><span class="Apple-tab-span">    </span>s.sendMsg(</span>"/s_new"<span class="s3">, </span>"detectSilence-help"<span class="s3">, -1);</span></p>
  58 <p class="p9"><span class="s3"><span class="Apple-tab-span">    </span>s.sendMsg(</span>"/s_new"<span class="s3">, </span>"detectSilence-help"<span class="s3">, -1);</span></p>
  59 <p class="p9"><span class="s3"><span class="Apple-tab-span">    </span>s.sendMsg(</span>"/s_new"<span class="s3">, </span>"detectSilence-help"<span class="s3">, -1);</span></p>
  60 <p class="p7"><br></p>
  61 <p class="p8"><span class="Apple-tab-span">     </span>(</p>
  62 <p class="p10"><span class="s3"><span class="Apple-tab-span">   </span></span>Task<span class="s3">({</span></p>
  63 <p class="p8"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>loop({</p>
  64 <p class="p9"><span class="s3"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span>s.sendMsg(</span>"/s_new"<span class="s3">, </span>"detectSilence-help"<span class="s3">, -1);</span></p>
  65 <p class="p8"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span>[0.5, 1].choose.wait;</p>
  66 <p class="p8"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>})</p>
  67 <p class="p8"><span class="Apple-tab-span">     </span>}).play;</p>
  68 <p class="p8"><span class="Apple-tab-span">     </span>)</p>
  69 <p class="p7"><span class="Apple-tab-span">     </span></p>
  70 <p class="p7"><span class="Apple-tab-span">     </span></p>
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