Help/UGens/Filters/Resonz.html

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  27 <p class="p1"><span class="s1"><b>Resonz<span class="Apple-tab-span">   </span><span class="Apple-tab-span">    </span></b></span><b><span class="Apple-tab-span">      </span>resonant filter</b></p>
  28 <p class="p2"><br></p>
  29 <p class="p3"><span class="s2"><b>Inherits from: </b><a href="../../Core/Object.html"><b>Object</b></a></span><span class="s3"><b> : </b><a href="../../Core/Kernel/AbstractFunction.html"><span class="s4"><b>AbstractFunction</b></span></a><b> : </b><a href="../UGen.html"><span class="s5"><b>UGen</b></span></a></span><span class="s5"><b> : </b><a href="../Filter.html"><span class="s6"><b>Filter</b></span></a><b><span class="Apple-converted-space"> </span></b></span></p>
  30 <p class="p2"><br></p>
  31 <p class="p1"><b>Resonz.ar(in, freq, rq, mul, add)</b></p>
  32 <p class="p1"><b>Resonz.kr(in, freq, rq, mul, add)</b></p>
  33 <p class="p2"><br></p>
  34 <p class="p1">A two pole resonant filter with zeroes at z = +/- 1. Based on K. Steiglitz,<span class="Apple-converted-space">  </span>"A Note on Constant-Gain<span class="Apple-converted-space"> </span></p>
  35 <p class="p1">Digital Resonators," <i>Computer Music Journal</i>, vol 18, no. 4, pp. 8-10, Winter 1994.</p>
  36 <p class="p2"><b></b><br></p>
  37 <p class="p1"><b>in</b> - input signal to be processed</p>
  38 <p class="p1"><b>freq</b> - resonant frequency in Hertz</p>
  39 <p class="p1"><b>rq</b> - bandwidth ratio (reciprocal of Q). rq = bandwidth / centerFreq</p>
  40 <p class="p1">The reciprocal of Q is used rather than Q because it saves a divide operation inside the unit generator.</p>
  41 <p class="p2"><br></p>
  42 <p class="p4">{ <span class="s7">Resonz</span>.ar(<span class="s7">WhiteNoise</span>.ar(0.5), 2000, 0.1) }.play</p>
  43 <p class="p5"><br></p>
  44 <p class="p6">// modulate frequency</p>
  45 <p class="p4">{ <span class="s7">Resonz</span>.ar(<span class="s7">WhiteNoise</span>.ar(0.5), <span class="s7">XLine</span>.kr(1000,8000,10), 0.05) }.play</p>
  46 <p class="p5"><br></p>
  47 <p class="p6">// modulate bandwidth</p>
  48 <p class="p4">{ <span class="s7">Resonz</span>.ar(<span class="s7">WhiteNoise</span>.ar(0.5), 2000, <span class="s7">XLine</span>.kr(1, 0.001, 8)) }.play</p>
  49 <p class="p5"><br></p>
  50 <p class="p6">// modulate bandwidth opposite direction</p>
  51 <p class="p4">{ <span class="s7">Resonz</span>.ar(<span class="s7">WhiteNoise</span>.ar(0.5), 2000, <span class="s7">XLine</span>.kr(0.001, 1, 8)) }.play</p>
  52 <p class="p5"><br></p>
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