Help/UGens/Filters/MulAdd.html

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  25 <p class="p1"><span class="s1"><b>MulAdd<span class="Apple-tab-span">   </span><span class="Apple-tab-span">    </span></b></span><b>Multiply and add to a signal</b></p>
  26 <p class="p2"><br></p>
  27 <p class="p3"><b>MulAdd(in, mul, add)</b></p>
  28 <p class="p3"><span class="Apple-tab-span">     </span>or</p>
  29 <p class="p3"><b>in.madd(mul, add)</b></p>
  30 <p class="p2"><br></p>
  31 <p class="p3">Multiplies the signal by <b>mul</b> and adds <b>add</b>. This UGen is very efficient (it performs various optimisation checks, for example). It is used very heavily throughout SuperCollider to perform multiply and add operations on the server; in fact it is<span class="Apple-converted-space">  </span>what "really" performs the mul and add arguments found in many UGens.</p>
  32 <p class="p2"><br></p>
  33 <p class="p3"><b>See also:</b> The discussion of mul and add arguments in the <a href="../UGen.html"><span class="s2">UGen</span></a> help file.</p>
  34 <p class="p2"><br></p>
  35 <p class="p2"><br></p>
  36 <p class="p3"><b>Examples</b></p>
  37 <p class="p2"><br></p>
  38 <p class="p4">s.boot;</p>
  39 <p class="p5"><br></p>
  40 <p class="p6">// The mul and add arguments of SinOsc themselves use MulAdd!</p>
  41 <p class="p6">// These two examples will create precisely the same synth graph:</p>
  42 <p class="p4">x = { <span class="s3">SinOsc</span>.ar(440, 0, 0.1, 0.05) }.play(s);</p>
  43 <p class="p6"><span class="s4">x.trace; </span>// You should see a "MulAdd" in the trace</p>
  44 <p class="p4">x.free;</p>
  45 <p class="p5"><br></p>
  46 <p class="p4">x = { <span class="s3">MulAdd</span>(<span class="s3">SinOsc</span>.ar(440, 0), 0.1, 0.05) }.play(s);</p>
  47 <p class="p4">x.trace;</p>
  48 <p class="p4">x.free;</p>
  49 <p class="p5"><br></p>
  50 <p class="p6">// In fact this will produce the same graph too - the separate multiply and add are optimised into one MulAdd</p>
  51 <p class="p4">x = { <span class="s3">SinOsc</span>.ar(440, 0) * 0.1 + 0.05 }.play(s);</p>
  52 <p class="p4">x.trace;</p>
  53 <p class="p4">x.free;</p>
  54 <p class="p2"><br></p>
  55 <p class="p3">(Note: the "trace" message is described in the helpfile for <a href="../../ServerArchitecture/Node.html"><span class="s5">Node</span></a>.)</p>
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