Help/Libraries/JITLib/tutorials/audio_rate_mapping.html

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  21 <p class="p1">// audio mapping in ProxySpace</p>
  22 <p class="p1">// todo. expand(numChannels) message</p>
  23 <p class="p2"><br></p>
  24 <p class="p2"><br></p>
  25 <p class="p3">p = <span class="s1">ProxySpace</span>.push(s.boot);</p>
  26 <p class="p3">p.fadeTime = 3;</p>
  27 <p class="p1">// some filters</p>
  28 <p class="p4"><span class="s2">~f1 = { </span>|a_in=#[0,0], freq=500, dt=0.01|<span class="s2"><span class="Apple-converted-space">  </span></span>Ringz<span class="s2">.ar(a_in, freq, dt) };<span class="Apple-converted-space"> </span></span></p>
  29 <p class="p3">~f2 = { <span class="s1">|a_in=#[0,0], dt=0.1|</span> <span class="s1">CombL</span>.ar(a_in, 0.5, dt, 15 * dt) };</p>
  30 <p class="p3">~f3 = { <span class="s1">|a_in=#[0,0], freq=30|</span> a_in * <span class="s1">LFSaw</span>.ar(freq.neg).max(0) };</p>
  31 <p class="p2"><br></p>
  32 <p class="p1">// some sources</p>
  33 <p class="p3">~x1 = { <span class="s1">LFPulse</span>.kr(<span class="s1">SinOsc</span>.kr(0.2).exprange(2, 200)) * <span class="s1">PinkNoise</span>.ar(0.5.dup) };</p>
  34 <p class="p3">~x2 = { <span class="s1">Dust</span>.ar(<span class="s1">SinOsc</span>.kr(0.2, [0, pi]).exprange(2, 2000)) };</p>
  35 <p class="p2"><br></p>
  36 <p class="p1">// the output</p>
  37 <p class="p3">~out.play;</p>
  38 <p class="p3">~out = { <span class="s1">|a_in=#[0,0]|</span> a_in };</p>
  39 <p class="p2"><br></p>
  40 <p class="p1">// some mappings by hand:</p>
  41 <p class="p3">~out.mapn(<span class="s3">\a_in</span>, ~x1);</p>
  42 <p class="p3">~out.xmapn(<span class="s3">\a_in</span>, ~x2);</p>
  43 <p class="p2"><br></p>
  44 <p class="p3">~out.xmapn(<span class="s3">\a_in</span>, ~f1); ~f1.xmapn(<span class="s3">\a_in</span>, ~x1);</p>
  45 <p class="p3">~out.xmapn(<span class="s3">\a_in</span>, ~f2); ~f2.xmapn(<span class="s3">\a_in</span>, ~x1);</p>
  46 <p class="p3">~out.xmapn(<span class="s3">\a_in</span>, ~f2); ~f2.xmapn(<span class="s3">\a_in</span>, ~x1);</p>
  47 <p class="p3">~f2.xset(<span class="s3">\dt</span>, 0.01);</p>
  48 <p class="p2"><br></p>
  49 <p class="p3">~mx1 = { <span class="s1">MouseX</span>.kr(0.0001, 1, 1) };</p>
  50 <p class="p3">~f2.xmap(<span class="s3">\dt</span>, ~mx1);</p>
  51 <p class="p2"><br></p>
  52 <p class="p3">~out.xmapn(<span class="s3">\a_in</span>, ~f3);<span class="Apple-converted-space">  </span>~f3.xmapn(<span class="s3">\a_in</span>, ~f2); ~f2.xmapn(<span class="s3">\a_in</span>, ~x1);</p>
  53 <p class="p1">// this should maybe be:</p>
  54 <p class="p1">// ~f2 --(\a_in)--&gt; ~f3 --(\a_in)--&gt; ~out</p>
  55 <p class="p2"><br></p>
  56 <p class="p3">~mx1 = { <span class="s1">LFNoise1</span>.kr(0.1).exprange(0.0001, 1) };</p>
  57 <p class="p3">~mF = { ~mx1.kr.linexp(0, 1, 1, 10000) };</p>
  58 <p class="p3">~f3.xmap(<span class="s3">\freq</span>, ~mF);</p>
  59 <p class="p2"><br></p>
  60 <p class="p3">~f1.mapn(<span class="s3">\a_in</span>, ~x2);</p>
  61 <p class="p3">~f2.xmapn(<span class="s3">\a_in</span>, ~f1);</p>
  62 <p class="p2"><br></p>
  63 <p class="p3">~f1.xmapn(<span class="s3">\freq</span>, ~mF, <span class="s3">\dt</span>, ~mx1);</p>
  64 <p class="p2"><br></p>
  65 <p class="p3">~x2 = { <span class="s1">Impulse</span>.ar(<span class="s1">SinOsc</span>.kr(0.2, [0, pi]).exprange(2, 200)) };</p>
  66 <p class="p3">~x1 = { <span class="s1">Saw</span>.ar(20, 0.5.dup) * ~x2.ar };</p>
  67 <p class="p3">~out = ~x1;</p>
  68 <p class="p2"><br></p>
  69 <p class="p2"><br></p>
  70 <p class="p1">// possible schema:</p>
  71 <p class="p1">/*</p>
  72 <p class="p5"><br></p>
  73 <p class="p1">px.map knows always already the number of channels of a proxy, so can decide whether</p>
  74 <p class="p1">to use map or mapn. (map always would mean flat mapping).</p>
  75 <p class="p5"><br></p>
  76 <p class="p1">px.mapn could do tricky things like:</p>
  77 <p class="p1">px.mapn(\a_in2, [mono1, mono2])</p>
  78 <p class="p1">px.mapn(\a_in2, stereo) would still work</p>
  79 <p class="p1">px.mapn(\a_in2, [stereo, mono]) could use the first of the stereo chans and the mono</p>
  80 <p class="p1">how to get at the second arg of the stereo in? or it could mix/wrap.</p>
  81 <p class="p1">--&gt; px.mapn([\a_inx, \a_iny], stereo)</p>
  82 <p class="p5"><br></p>
  83 <p class="p1">px.mapn(\a_in, stereo) would take the first of the stereo channels</p>
  84 <p class="p1">px.map(\a_in, stereo) would use the first of the stereo channels</p>
  85 <p class="p1">px.mapn(\a_in, [mono, mono]) would use the first channel</p>
  86 <p class="p5"><br></p>
  87 <p class="p1">mappings could be saved as is and if the proxy rebuilds with a different channel size, it would unfold?</p>
  88 <p class="p5"><br></p>
  89 <p class="p5"><br></p>
  90 <p class="p1">*/</p>
  91 <p class="p2"><br></p>
  92 <p class="p2"><br></p>
  93 <p class="p2"><br></p>
  94 <p class="p2"><br></p>
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