Help/UGens/Filters/LinExp.html

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  22 <p class="p1"><b>LinExp<span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span>convert a linear range to an exponential range</b></p>
  23 <p class="p2"><br></p>
  24 <p class="p3"><b>LinExp.ar(in, srclo, srchi, dstlo, dsthi)</b></p>
  25 <p class="p3"><b>LinExp.kr(in, srclo, srchi, dstlo, dsthi)</b></p>
  26 <p class="p2"><br></p>
  27 <p class="p3">Converts a linear range of values to an exponential range of values.</p>
  28 <p class="p3">The dstlo and dsthi arguments must be nonzero and have the same sign.</p>
  29 <p class="p3"><b>in</b> - input to convert.</p>
  30 <p class="p3"><b>srclo</b> - lower limit of input range.</p>
  31 <p class="p3"><b>srchi</b> - upper limit of input range.</p>
  32 <p class="p3"><b>dstlo</b> - lower limit of output range.</p>
  33 <p class="p3"><b>dsthi</b> - upper limit of output range.</p>
  34 <p class="p4"><br></p>
  35 <p class="p5"><br></p>
  36 <p class="p6">// compare:</p>
  37 <p class="p7">(</p>
  38 <p class="p7">{<span class="Apple-converted-space"> </span></p>
  39 <p class="p7"><span class="Apple-tab-span">     </span><span class="s1">var</span> mod = <span class="s1">SinOsc</span>.kr(<span class="s1">Line</span>.kr(1, 10, 10));</p>
  40 <p class="p7"><span class="Apple-tab-span">     </span><span class="s1">SinOsc</span>.ar(mod * 400 + 500) * 0.1<span class="Apple-converted-space"> </span></p>
  41 <p class="p7">}.play;</p>
  42 <p class="p7">)</p>
  43 <p class="p5"><br></p>
  44 <p class="p7">(</p>
  45 <p class="p7">{<span class="Apple-converted-space"> </span></p>
  46 <p class="p7"><span class="Apple-tab-span">     </span><span class="s1">var</span> mod = <span class="s1">SinOsc</span>.kr(<span class="s1">Line</span>.kr(1, 10, 10));</p>
  47 <p class="p7"><span class="Apple-tab-span">     </span><span class="s1">SinOsc</span>.ar(<span class="s1">LinExp</span>.kr(mod, -1,1, 100, 900)) * 0.1<span class="Apple-converted-space"> </span></p>
  48 <p class="p7">}.play;</p>
  49 <p class="p7">)</p>
  50 <p class="p5"><br></p>
  51 <p class="p6">// modulating destination values.</p>
  52 <p class="p7">(</p>
  53 <p class="p7">{<span class="Apple-converted-space"> </span></p>
  54 <p class="p7"><span class="Apple-tab-span">     </span><span class="s1">var</span> mod = <span class="s1">LFNoise2</span>.ar(80);</p>
  55 <p class="p7"><span class="Apple-tab-span">     </span><span class="s1">SinOsc</span>.ar(<span class="s1">LinExp</span>.ar(mod, -1,1, <span class="s1">MouseX</span>.kr(200, 8000, 1), <span class="s1">MouseY</span>.kr(200, 8000, 1))) * 0.1<span class="Apple-converted-space"> </span></p>
  56 <p class="p7">}.play;</p>
  57 <p class="p7">)</p>
  58 <p class="p5"><br></p>
  59 <p class="p5"><br></p>
  60 <p class="p3"><b>linexp</b> and <b>exprange</b> can be used to create a LinExp implicitly from a ugen, mapping its output values from linear range to an exponential one. The rate is derived from the ugen.</p>
  61 <p class="p5"><br></p>
  62 <p class="p5"><br></p>
  63 <p class="p6">// linexp</p>
  64 <p class="p7">(</p>
  65 <p class="p7">{<span class="Apple-converted-space"> </span></p>
  66 <p class="p7"><span class="Apple-tab-span">     </span><span class="s1">var</span> mod = <span class="s1">LFNoise2</span>.ar(80);</p>
  67 <p class="p7"><span class="Apple-tab-span">     </span><span class="s1">SinOsc</span>.ar(mod.linexp(-1,1, <span class="s1">MouseX</span>.kr(200, 8000, 1), <span class="s1">MouseY</span>.kr(200, 8000, 1))) * 0.1<span class="Apple-converted-space"> </span></p>
  68 <p class="p7">}.play;</p>
  69 <p class="p7">)</p>
  70 <p class="p5"><br></p>
  71 <p class="p6">// exprange</p>
  72 <p class="p7">(</p>
  73 <p class="p7">{<span class="Apple-converted-space"> </span></p>
  74 <p class="p7"><span class="Apple-tab-span">     </span><span class="s1">var</span> mod = <span class="s1">LFNoise2</span>.ar(80).exprange(<span class="s1">MouseX</span>.kr(200, 8000, 1), <span class="s1">MouseY</span>.kr(200, 8000, 1));</p>
  75 <p class="p7"><span class="Apple-tab-span">     </span><span class="s1">SinOsc</span>.ar(mod) * 0.1<span class="Apple-converted-space"> </span></p>
  76 <p class="p7">}.play;</p>
  77 <p class="p7">)</p>
  78 <p class="p5"><br></p>
  79 <p class="p5"><br></p>
  80 <p class="p5"><br></p>
  81 <p class="p5"><br></p>
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