Help/UGens/Filters/BPF.html

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  27 <p class="p1"><span class="s1"><b>BPF<span class="Apple-tab-span">      </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></b></span><b>2nd order Butterworth bandpass 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="p2"><br></p>
  32 <p class="p1"><b>BPF.ar(in, freq, rq, mul, add)</b></p>
  33 <p class="p1"><b>BPF.kr(in, freq, rq, mul, add)</b></p>
  34 <p class="p2"><br></p>
  35 <p class="p2"><br></p>
  36 <p class="p1">A second order Butterworth bandpass filter.<span class="Apple-converted-space"> </span></p>
  37 <p class="p2"><br></p>
  38 <p class="p1"><b>in</b> - input signal to be processed</p>
  39 <p class="p1"><b>freq</b> - centre frequency in Hertz.</p>
  40 <p class="p1"><b>rq</b> - the reciprocal of Q.<span class="Apple-converted-space">  </span>bandwidth / cutoffFreq.<span class="Apple-converted-space"> </span></p>
  41 <p class="p4"><br></p>
  42 <p class="p4"><br></p>
  43 <p class="p5">// modulate filter frequency with a sine</p>
  44 <p class="p6">{ <span class="s3">BPF</span>.ar(<span class="s3">Saw</span>.ar(200, 0.5), <span class="s3">SinOsc</span>.kr(<span class="s3">XLine</span>.kr(0.7, 300, 20), 0, 3600, 4000), 0.3) }.play;</p>
  45 <p class="p7"><br></p>
  46 <p class="p5">// modulate filter frequency with the cursor position</p>
  47 <p class="p6">{ <span class="s3">BPF</span>.ar(<span class="s3">Saw</span>.ar(200, 0.5), <span class="s3">MouseX</span>.kr(100, 10000, 1), 0.3) }.play;</p>
  48 <p class="p7"><br></p>
  49 <p class="p5">// BPF on control signals:</p>
  50 <p class="p6">(</p>
  51 <p class="p6">{ <span class="Apple-tab-span">   </span><span class="s3">var</span> vib = <span class="s3">BPF</span>.kr(<span class="s3">PinkNoise</span>.kr, <span class="s3">MouseX</span>.kr(1, 100, 1), 0.3) * 10;</p>
  52 <p class="p6"><span class="Apple-tab-span">     </span><span class="s3">SinOsc</span>.ar(vib * 200 + 600) * 0.2 }.play;</p>
  53 <p class="p6">)</p>
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