Help/UGens/Delays/PitchShift.html

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  25 <p class="p1"><b>PitchShift</b></p>
  26 <p class="p2"><br></p>
  27 <p class="p3"><b>PitchShift.ar(in, windowSize, pitchRatio, pitchDispersion, timeDispersion, mul, add)</b></p>
  28 <p class="p2"><br></p>
  29 <p class="p3">A time domain granular pitch shifter.</p>
  30 <p class="p3">Grains have a triangular amplitude envelope and an overlap of 4:1.</p>
  31 <p class="p3"><b>in</b> - the input signal.</p>
  32 <p class="p3"><b>windowSize</b> - the size of the grain window in seconds. This value cannot be modulated.</p>
  33 <p class="p3"><b>pitchRatio</b> - the ratio of the pitch shift. Must be from 0.0 to 4.0.</p>
  34 <p class="p3"><b>pitchDispersion</b> - the maximum random deviation of the pitch from the pitchRatio.</p>
  35 <p class="p3"><b>timeDispersion</b> - a random offset of from zero to timeDispersion seconds is added to the delay</p>
  36 <p class="p3">of each grain. Use of some dispersion can alleviate a hard comb filter effect due to uniform</p>
  37 <p class="p3">grain placement. It can also be an effect in itself. timeDispersion can be no larger than windowSize.</p>
  38 <p class="p4"><br></p>
  39 <p class="p5">(</p>
  40 <p class="p5">play({</p>
  41 <p class="p5"><span class="Apple-tab-span">     </span>z = <span class="s1">Blip</span>.ar(800, 6, 0.1);</p>
  42 <p class="p5"><span class="Apple-tab-span">     </span><span class="s1">PitchShift</span>.ar(z, 0.02, <span class="s1">Line</span>.kr(0.1,4,20), 0, 0.0001)</p>
  43 <p class="p5">}))</p>
  44 <p class="p6"><br></p>
  45 <p class="p5">(</p>
  46 <p class="p7">// pitch shift input - USE HEADPHONES to prevent feedback.</p>
  47 <p class="p5">play({</p>
  48 <p class="p8"><span class="s2"><span class="Apple-tab-span">    </span></span>PitchShift<span class="s2">.ar(</span></p>
  49 <p class="p7"><span class="s2"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></span><span class="s1">SoundIn</span><span class="s2">.ar([0,1]),<span class="Apple-tab-span">  </span></span>// stereo audio input</p>
  50 <p class="p7"><span class="s2"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span>0.1, <span class="Apple-tab-span">       </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></span>// grain size</p>
  51 <p class="p7"><span class="s2"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></span><span class="s1">MouseX</span><span class="s2">.kr(0,2),<span class="Apple-tab-span">     </span></span>// mouse x controls pitch shift ratio</p>
  52 <p class="p7"><span class="s2"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span>0, <span class="Apple-tab-span"> </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></span>// pitch dispersion</p>
  53 <p class="p7"><span class="s2"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span>0.004<span class="Apple-tab-span">       </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></span>// time dispersion</p>
  54 <p class="p5"><span class="Apple-tab-span">     </span>)</p>
  55 <p class="p5">}))</p>
  56 <p class="p6"><br></p>
  57 <p class="p5">(</p>
  58 <p class="p7">// use PitchShift to granulate input - USE HEADPHONES to prevent feedback.</p>
  59 <p class="p7">// upper left corner is normal playback. x = pitch dispersion, y = time dispersion</p>
  60 <p class="p5"><span class="s1">var</span> grainSize;</p>
  61 <p class="p5">grainSize = 0.5;</p>
  62 <p class="p5">play({</p>
  63 <p class="p8"><span class="s2"><span class="Apple-tab-span">    </span></span>PitchShift<span class="s2">.ar(</span></p>
  64 <p class="p5"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s1">SoundIn</span>.ar([0,1]),<span class="Apple-converted-space"> </span></p>
  65 <p class="p5"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>grainSize,<span class="Apple-converted-space"> <span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></span></p>
  66 <p class="p7"><span class="s2"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span>1,<span class="Apple-tab-span">  </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></span>// nominal pitch rate = 1</p>
  67 <p class="p7"><span class="s2"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></span><span class="s1">MouseX</span><span class="s2">.kr(0,1), <span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></span>// pitch dispersion</p>
  68 <p class="p5"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s1">MouseY</span>.kr(0, grainSize)<span class="Apple-tab-span">     </span><span class="s3">// time dispersion</span></p>
  69 <p class="p5"><span class="Apple-tab-span">     </span>)</p>
  70 <p class="p5">}))</p>
  71 <p class="p4"><br></p>
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