Help/UGens/FFT/PV_PhaseShift.html

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  28 <p class="p1"><span class="s1"><b>PV_PhaseShift<span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></b></span><b>shift phase of all bins</b></p>
  29 <p class="p2"><br></p>
  30 <p class="p3"><span class="s2"><b>Inherits from: </b><a href="../../Core/Object.html"><b>Object</b></a></span><b> : </b><a href="../../Core/Kernel/AbstractFunction.html"><b>AbstractFunction</b></a><b> : </b><a href="../UGen.html"><b>UGen</b></a><b> : </b><a href="../PV_ChainUGen.html"><b>PV_ChainUGen</b></a></p>
  31 <p class="p2"><br></p>
  32 <p class="p1"><b>PV_PhaseShift(buffer, shift)</b></p>
  33 <p class="p2"><br></p>
  34 <p class="p1"><b>buffer</b> - fft buffer.</p>
  35 <p class="p1"><b>shift</b> - phase shift in radians.</p>
  36 <p class="p2"><br></p>
  37 <p class="p4"><span class="s2">See also <a href="FFT Overview.html"><span class="s3">FFT Overview</span></a>.</span></p>
  38 <p class="p5"><br></p>
  39 <p class="p6">// internal server for scoping</p>
  40 <p class="p7"><span class="s4">Server</span>.default = s = <span class="s4">Server</span>.internal; s.boot;</p>
  41 <p class="p5"><br></p>
  42 <p class="p5"><br></p>
  43 <p class="p5"><br></p>
  44 <p class="p7">(</p>
  45 <p class="p7">{</p>
  46 <p class="p7"><span class="Apple-tab-span">     </span><span class="s4">var</span> in, chain;</p>
  47 <p class="p7"><span class="Apple-tab-span">     </span>in = <span class="s4">SinOsc</span>.ar(500);</p>
  48 <p class="p7"><span class="Apple-tab-span">     </span>chain = <span class="s4">FFT</span>(<span class="s4">LocalBuf</span>(2048), in);</p>
  49 <p class="p7"><span class="Apple-tab-span">     </span>chain = <span class="s4">PV_PhaseShift</span>(chain, <span class="s4">LFNoise2</span>.kr(1, pi, pi));<span class="Apple-converted-space"> </span></p>
  50 <p class="p7"><span class="Apple-tab-span">     </span>0.2 * [in, <span class="s4">IFFT</span>(chain)]; <span class="Apple-converted-space"> </span></p>
  51 <p class="p7">}.scope;</p>
  52 <p class="p7">)</p>
  53 <p class="p5"><br></p>
  54 <p class="p7">(</p>
  55 <p class="p7">{</p>
  56 <p class="p7"><span class="Apple-tab-span">     </span><span class="s4">var</span> in, chain;</p>
  57 <p class="p7"><span class="Apple-tab-span">     </span>in = <span class="s4">Impulse</span>.ar(130);</p>
  58 <p class="p7"><span class="Apple-tab-span">     </span>chain = <span class="s4">FFT</span>(<span class="s4">LocalBuf</span>(2048), in);</p>
  59 <p class="p7"><span class="Apple-tab-span">     </span>chain = <span class="s4">PV_PhaseShift</span>(chain, <span class="s4">LFNoise2</span>.kr(1, pi, pi));<span class="Apple-converted-space"> </span></p>
  60 <p class="p7"><span class="Apple-tab-span">     </span>0.2 * [in, <span class="s4">IFFT</span>(chain)]; <span class="Apple-converted-space"> </span></p>
  61 <p class="p7">}.scope(zoom: 9);</p>
  62 <p class="p7">)</p>
  63 <p class="p5"><br></p>
  64 <p class="p5"><br></p>
  65 <p class="p7">b = <span class="s4">Buffer</span>.alloc(s, 2048);</p>
  66 <p class="p7">c = <span class="s4">Buffer</span>.alloc(s, 2048);</p>
  67 <p class="p5"><br></p>
  68 <p class="p7">(</p>
  69 <p class="p7">{</p>
  70 <p class="p7"><span class="Apple-tab-span">     </span><span class="s4">var</span> in, chainA, chainB;</p>
  71 <p class="p7"><span class="Apple-tab-span">     </span>in = <span class="s4">SinOsc</span>.ar(500);</p>
  72 <p class="p7"><span class="Apple-tab-span">     </span>chainA = <span class="s4">FFT</span>(b, in);</p>
  73 <p class="p7"><span class="Apple-tab-span">     </span>chainB = <span class="s4">PV_Copy</span>(chainA, c);</p>
  74 <p class="p6"><span class="s2"><span class="Apple-tab-span">    </span>chainB = </span><span class="s4">PV_PhaseShift</span><span class="s2">(chainB, pi); </span>// shifted by 180 degrees</p>
  75 <p class="p7"><span class="Apple-tab-span">     </span>0.2 * <span class="s4">IFFT</span>([chainA, chainB]);<span class="Apple-converted-space">  </span><span class="s5">// normal, shifted</span></p>
  76 <p class="p7">}.scope;</p>
  77 <p class="p7">)</p>
  78 <p class="p5"><br></p>
  79 <p class="p7">(</p>
  80 <p class="p7">{ <span class="s4">var</span> in, chain, chainB, pan;</p>
  81 <p class="p7"><span class="Apple-tab-span">     </span>in = <span class="s4">PlayBuf</span>.ar(1, d, <span class="s4">BufRateScale</span>.kr(d), loop: 1) * 2;</p>
  82 <p class="p7"><span class="Apple-tab-span">     </span>chain = <span class="s4">FFT</span>(b, in);</p>
  83 <p class="p7"><span class="Apple-tab-span">     </span>chainB = <span class="s4">PV_Copy</span>(chain, c);</p>
  84 <p class="p7"><span class="Apple-tab-span">     </span>pan = <span class="s4">MouseX</span>.kr(0.001, 1.001, <span class="s6">'exponential'</span>) - 0.001;</p>
  85 <p class="p7"><span class="Apple-tab-span">     </span>chain = <span class="s4">PV_BrickWall</span>(chain, pan);<span class="Apple-converted-space"> </span></p>
  86 <p class="p7"><span class="Apple-tab-span">     </span>chainB = <span class="s4">PV_BrickWall</span>(chainB, -1 + pan); <span class="Apple-converted-space"> </span></p>
  87 <p class="p7"><span class="Apple-tab-span">     </span>0.5 * <span class="s4">IFFT</span>([chain, chainB]);</p>
  88 <p class="p7">}.scope;</p>
  89 <p class="p7">)</p>
  90 <p class="p5"><br></p>
  91 <p class="p5"><br></p>
  92 <p class="p5"><br></p>
  93 <p class="p5"><br></p>
  94 <p class="p6">// LocalBuf does not work for PV_PhaseShift and PV_Copy yet. Reason still unclear.</p>
  95 <p class="p5"><br></p>
  96 <p class="p5"><br></p>
  97 <p class="p7">(</p>
  98 <p class="p7">{</p>
  99 <p class="p7"><span class="Apple-tab-span">     </span><span class="s4">var</span> in, chainA, chainB;</p>
 100 <p class="p7"><span class="Apple-tab-span">     </span>in = <span class="s4">SinOsc</span>.ar(500);</p>
 101 <p class="p7"><span class="Apple-tab-span">     </span>chainA = <span class="s4">FFT</span>(<span class="s4">LocalBuf</span>(2048), in);</p>
 102 <p class="p7"><span class="Apple-tab-span">     </span>chainB = <span class="s4">PV_Copy</span>(chainA, <span class="s4">LocalBuf</span>(2048));</p>
 103 <p class="p7"><span class="Apple-tab-span">     </span>0.2 * <span class="s4">IFFT</span>([chainA, chainB]);<span class="Apple-converted-space">  </span><span class="s5">// normal, shifted</span></p>
 104 <p class="p7">}.scope;</p>
 105 <p class="p7">)</p>
 106 <p class="p5"><br></p>
 107 <p class="p5"><br></p>
 108 <p class="p5"><br></p>
 109 <p class="p7">(</p>
 110 <p class="p7">{</p>
 111 <p class="p7"><span class="Apple-tab-span">     </span><span class="s4">var</span> in, chainA, chainB;</p>
 112 <p class="p7"><span class="Apple-tab-span">     </span>in = <span class="s4">SinOsc</span>.ar(500);</p>
 113 <p class="p7"><span class="Apple-tab-span">     </span>chainA = <span class="s4">FFT</span>(<span class="s4">LocalBuf</span>(2048), in);</p>
 114 <p class="p7"><span class="Apple-tab-span">     </span>chainB = <span class="s4">PV_Copy</span>(chainA, <span class="s4">LocalBuf</span>(2048));</p>
 115 <p class="p6"><span class="s2"><span class="Apple-tab-span">    </span>chainB = </span><span class="s4">PV_PhaseShift</span><span class="s2">(chainB, pi); </span>// shifted by 180 degrees</p>
 116 <p class="p7"><span class="Apple-tab-span">     </span>0.2 * <span class="s4">IFFT</span>([chainA, chainB]);<span class="Apple-converted-space">  </span><span class="s5">// normal, shifted</span></p>
 117 <p class="p7">}.scope;</p>
 118 <p class="p7">)</p>
 119 <p class="p5"><br></p>
 120 <p class="p8"><span class="s2">d = </span><span class="s4">Buffer</span><span class="s2">.read(s,</span>"sounds/a11wlk01.wav"<span class="s2">);</span></p>
 121 <p class="p5"><br></p>
 122 <p class="p7">(</p>
 123 <p class="p7">{ <span class="s4">var</span> in, chain, chainB, pan;</p>
 124 <p class="p7"><span class="Apple-tab-span">     </span>in = <span class="s4">PlayBuf</span>.ar(1, d, <span class="s4">BufRateScale</span>.kr(d), loop: 1) * 2;</p>
 125 <p class="p7"><span class="Apple-tab-span">     </span>chain = <span class="s4">FFT</span>(<span class="s4">LocalBuf</span>(2048), in);</p>
 126 <p class="p6"><span class="s2"><span class="Apple-tab-span">    </span></span>//chainB = PV_Copy(chain, LocalBuf(2048));</p>
 127 <p class="p7"><span class="Apple-tab-span">     </span>pan = <span class="s4">MouseX</span>.kr(0.001, 1.001, <span class="s6">'exponential'</span>) - 0.001;</p>
 128 <p class="p7"><span class="Apple-tab-span">     </span>chain = <span class="s4">PV_BrickWall</span>(chain, pan);<span class="Apple-converted-space"> </span></p>
 129 <p class="p6"><span class="s2"><span class="Apple-tab-span">    </span></span>//chainB = PV_BrickWall(chainB, -1 + pan); <span class="Apple-converted-space"> </span></p>
 130 <p class="p6"><span class="s2"><span class="Apple-tab-span">    </span></span>//0.5 * IFFT([chain, chainB]);</p>
 131 <p class="p7"><span class="Apple-tab-span">     </span>0.5 * <span class="s4">IFFT</span>(chain)</p>
 132 <p class="p7">}.scope;</p>
 133 <p class="p7">)</p>
 134 </body>
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