Help/UGens/Filters/Formlet.html

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  26 <p class="p1"><span class="s1"><b>Formlet<span class="Apple-tab-span">  </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></b></span><b>FOF-like filter</b></p>
  27 <p class="p2"><br></p>
  28 <p class="p3"><span class="s2"><b>Inherits from: </b><a href="../../Core/Object.html"><span class="s3"><b>Object</b></span></a></span><b> : </b><a href="../../Core/Kernel/AbstractFunction.html"><b>AbstractFunction</b></a><b> : </b><a href="../UGen.html"><b>UGen</b></a><b> : </b><a href="../Filter.html"><b>Filter</b></a><b><span class="Apple-converted-space"> </span></b></p>
  29 <p class="p2"><br></p>
  30 <p class="p1"><b>Formlet.ar(in, freq, attacktime, decaytime, mul, add)</b></p>
  31 <p class="p1"><b>Formlet.kr(in, freq, attacktime, decaytime, mul, add)</b></p>
  32 <p class="p2"><br></p>
  33 <p class="p2"><br></p>
  34 <p class="p1">This is a resonant filter whose impulse response is like that of a sine wave with a <a href="../Synth control/Envelopes/Decay2.html"><span class="s4">Decay2</span></a> envelope over it.</p>
  35 <p class="p1">It is possible to control the attacktime and decaytime.</p>
  36 <p class="p2"><br></p>
  37 <p class="p1">Formlet is equivalent to:</p>
  38 <p class="p2"><br></p>
  39 <p class="p1">Ringz(in, freq, decaytime) - Ringz(in, freq, attacktime)</p>
  40 <p class="p2"><br></p>
  41 <p class="p1">Note that if attacktime == decaytime then the signal cancels out and if attacktime &gt; decaytime</p>
  42 <p class="p1">then the impulse response is inverted.</p>
  43 <p class="p2"><br></p>
  44 <p class="p1">The great advantage to this filter over FOF is that there is no limit to the number of overlapping</p>
  45 <p class="p1">grains since the grain is just the impulse response of the filter.</p>
  46 <p class="p2"><br></p>
  47 <p class="p1"><b>in</b> - input signal to be processed</p>
  48 <p class="p1"><b>freq</b> - resonant frequency in Hertz</p>
  49 <p class="p1"><b>attackTime</b> - 60 dB attack time in seconds.</p>
  50 <p class="p1"><b>decayTime</b> - 60 dB decay time in seconds.</p>
  51 <p class="p2"><br></p>
  52 <p class="p4"><br></p>
  53 <p class="p4"><br></p>
  54 <p class="p5">{ <span class="s4">Formlet</span>.ar(<span class="s4">Impulse</span>.ar(20, 0.5), 1000, 0.01, 0.1) }.play;</p>
  55 <p class="p4"><br></p>
  56 <p class="p5">{ <span class="s4">Formlet</span>.ar(<span class="s4">Blip</span>.ar(<span class="s4">XLine</span>.kr(10,400,8), 1000, 0.1), 1000, 0.01, 0.1) }.play;</p>
  57 <p class="p4"><br></p>
  58 <p class="p5">(</p>
  59 <p class="p6">// modulating formant frequency</p>
  60 <p class="p5">{<span class="Apple-converted-space"> </span></p>
  61 <p class="p5"><span class="Apple-tab-span">     </span><span class="s4">var</span> in;</p>
  62 <p class="p5"><span class="Apple-tab-span">     </span>in = <span class="s4">Blip</span>.ar(<span class="s4">SinOsc</span>.kr(5,0,20,300), 1000, 0.1);</p>
  63 <p class="p5"><span class="Apple-tab-span">     </span><span class="s4">Formlet</span>.ar(in, <span class="s4">XLine</span>.kr(1500,700,8), 0.005, 0.04);</p>
  64 <p class="p5">}.play;</p>
  65 <p class="p5">)</p>
  66 <p class="p4"><br></p>
  67 <p class="p5">(</p>
  68 <p class="p6">// mouse control of frequency and decay time.</p>
  69 <p class="p5">{<span class="Apple-converted-space"> </span></p>
  70 <p class="p5"><span class="Apple-tab-span">     </span><span class="s4">var</span> in;</p>
  71 <p class="p5"><span class="Apple-tab-span">     </span>in = <span class="s4">Blip</span>.ar(<span class="s4">SinOsc</span>.kr(5,0,20,300), 1000, 0.1);</p>
  72 <p class="p5"><span class="Apple-tab-span">     </span><span class="s4">Formlet</span>.ar(in,<span class="Apple-converted-space"> </span></p>
  73 <p class="p5"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s4">MouseY</span>.kr(700,2000,<span class="s5">1</span>),<span class="Apple-converted-space"> </span></p>
  74 <p class="p5"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>0.005, <span class="s4">MouseX</span>.kr(0.01,0.2,<span class="s5">1</span>));</p>
  75 <p class="p5">}.play;</p>
  76 <p class="p5">)</p>
  77 <p class="p4"><br></p>
  78 <p class="p5">(</p>
  79 <p class="p6">// mouse control of frequency and decay time.</p>
  80 <p class="p5">{<span class="Apple-converted-space"> </span></p>
  81 <p class="p5"><span class="Apple-tab-span">     </span><span class="s4">var</span> freq;</p>
  82 <p class="p5"><span class="Apple-tab-span">     </span>freq = <span class="s4">Formlet</span>.kr(</p>
  83 <p class="p5"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s4">Dust</span>.kr(10 ! 2),<span class="Apple-converted-space"> </span></p>
  84 <p class="p5"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s4">MouseY</span>.kr(7,200,<span class="s5">1</span>),<span class="Apple-converted-space"> </span></p>
  85 <p class="p5"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>0.005, <span class="s4">MouseX</span>.kr(0.1,2,<span class="s5">1</span>)</p>
  86 <p class="p5"><span class="Apple-tab-span">     </span>);</p>
  87 <p class="p5"><span class="Apple-tab-span">     </span>SinOsc.ar(freq * 200 + [500, 600] - 100) * 0.2</p>
  88 <p class="p5">}.play;</p>
  89 <p class="p5">)</p>
  90 <p class="p7"><br></p>
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