Help/UGens/Filters/Changed.html

   1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
   2 <html>
   3 <head>
   4 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
   5 <meta http-equiv="Content-Style-Type" content="text/css">
   6 <title></title>
   7 <meta name="Generator" content="Cocoa HTML Writer">
   8 <meta name="CocoaVersion" content="1038.35">
   9 <style type="text/css">
  10 p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica}
  11 p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; min-height: 14.0px}
  12 p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; color: #0021e7}
  13 p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Courier}
  14 p.p5 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Monaco; min-height: 12.0px}
  15 p.p6 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Monaco; color: #bf0000}
  16 p.p7 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Monaco}
  17 p.p8 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Helvetica; min-height: 11.0px}
  18 span.s1 {font: 18.0px Helvetica}
  19 span.s2 {color: #000000}
  20 span.s3 {color: #0000ee}
  21 span.s4 {color: #0026b4}
  22 span.s5 {color: #0021e7}
  23 span.s6 {color: #002fe0}
  24 span.s7 {color: #0000ff}
  25 span.s8 {color: #0000bf}
  26 span.Apple-tab-span {white-space:pre}
  27 </style>
  28 </head>
  29 <body>
  30 <p class="p1"><span class="s1"><b>Changed<span class="Apple-tab-span">  </span><span class="Apple-tab-span">    </span></b></span><b><span class="Apple-tab-span">      </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span>triggers when a value changes</b></p>
  31 <p class="p2"><br></p>
  32 <p class="p3"><span class="s2"><b>Inherits from: </b><a href="../../Core/Object.html"><span class="s3"><b>Object</b></span></a></span><span class="s4"><b> : </b><a href="../../Core/Kernel/AbstractFunction.html"><span class="s5"><b>AbstractFunction</b></span></a><b> : </b><a href="../UGen.html"><span class="s6"><b>UGen</b></span></a></span><span class="s6"><b> : </b><a href="../Filter.html"><span class="s7"><b>Filter</b></span></a><b><span class="Apple-converted-space"> </span></b></span></p>
  33 <p class="p2"><br></p>
  34 <p class="p1"><b>Changed.ar(in, thresh)</b></p>
  35 <p class="p1"><b>Changed.kr(in, thresh)</b></p>
  36 <p class="p2"><br></p>
  37 <p class="p1">A special case fixed filter. Implements the formula:</p>
  38 <p class="p2"><br></p>
  39 <p class="p4">out(i) = abs(in(i) - in(i-1)) &gt; thresh</p>
  40 <p class="p2"><br></p>
  41 <p class="p2"><br></p>
  42 <p class="p2"><br></p>
  43 <p class="p5"><br></p>
  44 <p class="p6">// detect changes in a signal:</p>
  45 <p class="p7">(</p>
  46 <p class="p7">{<span class="Apple-converted-space"> <span class="Apple-tab-span">      </span></span></p>
  47 <p class="p7"><span class="Apple-tab-span">     </span><span class="s8">var</span> changingSignal = <span class="s8">LFNoise0</span>.ar(1000);<span class="Apple-converted-space"> </span></p>
  48 <p class="p7"><span class="Apple-tab-span">     </span><span class="s8">var</span> changed = <span class="s8">Changed</span>.ar(changingSignal);</p>
  49 <p class="p7"><span class="Apple-tab-span">     </span>[changingSignal, changed]</p>
  50 <p class="p7">}.plot2</p>
  51 <p class="p7">);</p>
  52 <p class="p8"><br></p>
  53 </body>
  54 </html>