Help/UGens/FFT/PV_Min.html

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  28 <p class="p1"><b>PV_Min<span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span>minimum magnitude</b></p>
  29 <p class="p2"><br></p>
  30 <p class="p3"><b>PV_Min(bufferA,<span class="Apple-converted-space">  </span>bufferB)</b></p>
  31 <p class="p2"><br></p>
  32 <p class="p3">Output copies bins with the minimum magnitude of the two inputs.</p>
  33 <p class="p3"><b>bufferA</b> - fft buffer A.</p>
  34 <p class="p3"><b>bufferB</b> - fft buffer B.</p>
  35 <p class="p2"><br></p>
  36 <p class="p4"><span class="s1">See also <a href="FFT Overview.html"><span class="s2">FFT Overview</span></a>.</span></p>
  37 <p class="p2"><br></p>
  38 <p class="p5">s.boot;</p>
  39 <p class="p6"><br></p>
  40 <p class="p5">(</p>
  41 <p class="p5">{</p>
  42 <p class="p5"><span class="Apple-tab-span">     </span><span class="s3">var</span> inA, chainA, inB, chainB, chain ;</p>
  43 <p class="p5"><span class="Apple-tab-span">     </span>inA = <span class="s3">Saw</span>.ar(<span class="s3">LFNoise1</span>.kr(2).exprange(10, 1000));</p>
  44 <p class="p5"><span class="Apple-tab-span">     </span>inB =<span class="Apple-converted-space">  </span><span class="s3">Pulse</span>.ar(<span class="s3">LFNoise1</span>.kr(2).exprange(10, 1000));</p>
  45 <p class="p5"><span class="Apple-tab-span">     </span>chainA = <span class="s3">FFT</span>(<span class="s3">LocalBuf</span>(2048), inA);</p>
  46 <p class="p5"><span class="Apple-tab-span">     </span>chainB = <span class="s3">FFT</span>(<span class="s3">LocalBuf</span>(2048), inB);</p>
  47 <p class="p5"><span class="Apple-tab-span">     </span>chain = <span class="s3">PV_Min</span>(chainA, chainB);<span class="Apple-converted-space"> </span></p>
  48 <p class="p5"><span class="Apple-tab-span">     </span>0.1 * <span class="s3">IFFT</span>(chain).dup;</p>
  49 <p class="p5">}.play</p>
  50 <p class="p5">);</p>
  51 <p class="p6"><br></p>
  52 <p class="p6"><br></p>
  53 <p class="p7">// stereo version:</p>
  54 <p class="p6"><br></p>
  55 <p class="p5">(</p>
  56 <p class="p5">{</p>
  57 <p class="p5"><span class="Apple-tab-span">     </span><span class="s3">var</span> inA, chainA, inB, chainB, chain ;</p>
  58 <p class="p5"><span class="Apple-tab-span">     </span>inA = <span class="s3">Saw</span>.ar(<span class="s3">LFNoise1</span>.kr(2).exprange(10, 1000)); <span class="s4">// same saw through different pulses</span></p>
  59 <p class="p5"><span class="Apple-tab-span">     </span>inB =<span class="Apple-converted-space">  </span><span class="s3">Pulse</span>.ar(<span class="s3">LFNoise1</span>.kr(2.dup).exprange(10, 1000));</p>
  60 <p class="p5"><span class="Apple-tab-span">     </span>chainA = <span class="s3">FFT</span>(<span class="s3">LocalBuf</span>(2048.dup), inA);</p>
  61 <p class="p5"><span class="Apple-tab-span">     </span>chainB = <span class="s3">FFT</span>(<span class="s3">LocalBuf</span>(2048.dup), inB);</p>
  62 <p class="p5"><span class="Apple-tab-span">     </span>chain = <span class="s3">PV_Min</span>(chainA, chainB);<span class="Apple-converted-space"> </span></p>
  63 <p class="p5"><span class="Apple-tab-span">     </span>0.1 * <span class="s3">IFFT</span>(chain);</p>
  64 <p class="p5">}.play</p>
  65 <p class="p5">);</p>
  66 <p class="p6"><br></p>
  67 <p class="p6"><br></p>
  68 <p class="p6"><br></p>
  69 <p class="p5">(</p>
  70 <p class="p5"><span class="s3">SynthDef</span>(<span class="s5">\help_max</span>, { <span class="s3">arg</span> out=0, soundBufnum1=0, soundBufnum2 = 0;</p>
  71 <p class="p5"><span class="Apple-tab-span">     </span><span class="s3">var</span> inA, chainA, inB, chainB, chain ;</p>
  72 <p class="p5"><span class="Apple-tab-span">     </span>inA = <span class="s3">PlayBuf</span>.ar(1, soundBufnum1, <span class="s3">BufRateScale</span>.kr(soundBufnum1), loop: 1);</p>
  73 <p class="p5"><span class="Apple-tab-span">     </span>inB =<span class="Apple-converted-space">  </span><span class="s3">PlayBuf</span>.ar(1, soundBufnum2, <span class="s3">BufRateScale</span>.kr(soundBufnum2), loop: 1);</p>
  74 <p class="p5"><span class="Apple-tab-span">     </span>chainA = <span class="s3">FFT</span>(<span class="s3">LocalBuf</span>(2048), inA);</p>
  75 <p class="p5"><span class="Apple-tab-span">     </span>chainB = <span class="s3">FFT</span>(<span class="s3">LocalBuf</span>(2048), inB);</p>
  76 <p class="p5"><span class="Apple-tab-span">     </span>chain = <span class="s3">PV_Min</span>(chainA, chainB);<span class="Apple-converted-space"> </span></p>
  77 <p class="p5"><span class="Apple-tab-span">     </span><span class="s3">Out</span>.ar(out,<span class="Apple-converted-space">  </span>0.5 * <span class="s3">IFFT</span>(chain).dup);</p>
  78 <p class="p5">}).store;</p>
  79 <p class="p5">);</p>
  80 <p class="p6"><br></p>
  81 <p class="p6"><br></p>
  82 <p class="p5">(</p>
  83 <p class="p7"><span class="s1">q = q ? (); </span>// use global dictionary</p>
  84 <p class="p6"><br></p>
  85 <p class="p8"><span class="s1"><span class="Apple-tab-span">    </span>q[</span><span class="s5">\bufferA</span><span class="s1">] = </span><span class="s3">Buffer</span><span class="s1">.read(s,</span>"sounds/a11wlk01.wav"<span class="s1">);</span></p>
  86 <p class="p7"><span class="s1"><span class="Apple-tab-span">    </span></span><span class="s3">CocoaDialog</span><span class="s1">.getPaths({ </span><span class="s3">arg</span><span class="s1"> paths; </span>// get a second soundfile;</p>
  87 <p class="p5"><span class="Apple-tab-span">     </span>paths.do({ <span class="s3">arg</span> p;<span class="Apple-converted-space"> </span></p>
  88 <p class="p5"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>q[<span class="s5">\bufferB</span>] = <span class="s3">Buffer</span>.read(s, p);</p>
  89 <p class="p9"><span class="s1"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></span><span class="s3">Synth</span><span class="s1">(</span>\help_max<span class="s1">, [</span>\out<span class="s1">, 0, </span>\soundBufnum1<span class="s1">, q[</span>\bufferA<span class="s1">], </span>\soundBufnum2<span class="s1">, q[</span>\bufferB<span class="s1">]]);</span></p>
  90 <p class="p5"><span class="Apple-tab-span">     </span>})</p>
  91 <p class="p5">},{</p>
  92 <p class="p8"><span class="s1"><span class="Apple-tab-span">    </span></span>"cancelled"<span class="s1">.postln;</span></p>
  93 <p class="p5">});</p>
  94 <p class="p5">)</p>
  95 <p class="p6"><br></p>
  96 <p class="p5">q[<span class="s5">\bufferA</span>].free;</p>
  97 <p class="p5">q[<span class="s5">\bufferB</span>].free;</p>
  98 </body>
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