Help/UGens/Playback and Recording/VDiskIn.html

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  32 <p class="p1"><b>VDiskIn<span class="Apple-tab-span">   </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span>stream in audio from a file (with variable rate)</b></p>
  33 <p class="p2"><br></p>
  34 <p class="p2"><br></p>
  35 <p class="p3"><b>VDiskIn.ar(numChannels, bufnum, rate, loop, sendID )</b></p>
  36 <p class="p2"><br></p>
  37 <p class="p3">Continuously play a longer soundfile from disk.<span class="Apple-converted-space">  </span>This requires a buffer to be preloaded with one buffer size of sound. If loop is set to 1, the soundfile will loop. If a sendID is given, the UGen sends an osc message with this id and the file position each time it reloads the buffer: ['/diskin', nodeID, sendID, frame]<span class="Apple-converted-space"> </span></p>
  38 <p class="p4"><br></p>
  39 <p class="p3"><b>rate</b> controls the rate of playback. Values below 4 are probably fine, but the higher the value, the more disk activity there is, and the more likelihood there will be a problem.</p>
  40 <p class="p4"><br></p>
  41 <p class="p3"><b>WARNING:</b> the rate does have a practical limit. The following must be true:<span class="Apple-converted-space"> </span></p>
  42 <p class="p3"><span class="Apple-tab-span">     </span>rate<span class="Apple-converted-space">  </span>&lt; Buffer's size / ( 2 * s.options.blockSize)</p>
  43 <p class="p3"><span class="Apple-tab-span">     </span>e.g with typical default values, this wil be 32768 / (2 * 64) = 256.</p>
  44 <p class="p4"><span class="Apple-tab-span">     </span></p>
  45 <p class="p3">If the rate is too high, the UGen will not execute, posting a warning.</p>
  46 <p class="p4"><br></p>
  47 <p class="p4"><br></p>
  48 <p class="p3"><b>See also:</b> <a href="PlayBuf.html"><span class="s1">PlayBuf</span></a>, <a href="../Oscillators/BufRd.html"><span class="s2">BufRd</span></a><span class="Apple-converted-space"> </span></p>
  49 <p class="p5"><br></p>
  50 <p class="p5"><br></p>
  51 <p class="p6"><br></p>
  52 <p class="p5"><br></p>
  53 <p class="p7"><br></p>
  54 <p class="p8">b = <span class="s3">Buffer</span>.cueSoundFile(s, <span class="s4">"sounds/a11wlk01-44_1.aiff"</span>, 0, 1);</p>
  55 <p class="p7"><br></p>
  56 <p class="p8">x = { <span class="s3">VDiskIn</span>.ar(1, b, <span class="s3">LFNoise2</span>.kr(0.2).range(0.5, 2), 1, loop:1) }.play;</p>
  57 <p class="p7"><br></p>
  58 <p class="p8">b.close;<span class="Apple-tab-span">     </span></p>
  59 <p class="p7"><br></p>
  60 <p class="p9">// again</p>
  61 <p class="p9">// note the like named instance method, but different arguments</p>
  62 <p class="p10"><span class="s5">b.cueSoundFile(</span>"sounds/a11wlk01-44_1.aiff"<span class="s5">, 0);<span class="Apple-tab-span">    </span></span></p>
  63 <p class="p7"><span class="Apple-tab-span">     </span></p>
  64 <p class="p8">x.free; b.close; b.free;<span class="Apple-tab-span">     </span></p>
  65 <p class="p7"><br></p>
  66 <p class="p7"><br></p>
  67 <p class="p9">// cue and play right away</p>
  68 <p class="p8">(</p>
  69 <p class="p8"><span class="s3">SynthDef</span>(<span class="s4">"help-VDiskin"</span>, { <span class="s3">arg</span> bufnum = 0;</p>
  70 <p class="p8"><span class="Apple-tab-span">     </span><span class="s3">Out</span>.ar(0, <span class="s3">VDiskIn</span>.ar(1, bufnum, <span class="s3">MouseX</span>.kr(0.5, 2.0)));</p>
  71 <p class="p8">}).send(s);</p>
  72 <p class="p8">)</p>
  73 <p class="p8">(</p>
  74 <p class="p8">x = <span class="s3">Synth</span>.basicNew(<span class="s4">"help-VDiskin"</span>);</p>
  75 <p class="p8">m = { <span class="s3">arg</span> buf; x.addToHeadMsg(<span class="s3">nil</span>, [<span class="s6">\bufnum</span>, buf])};</p>
  76 <p class="p7"><br></p>
  77 <p class="p8">b = <span class="s3">Buffer</span>.cueSoundFile(s,<span class="s4">"sounds/a11wlk01-44_1.aiff"</span>,0,1, completionMessage: m);</p>
  78 <p class="p8">)<span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></p>
  79 <p class="p7"><br></p>
  80 <p class="p8">x.free; b.close; b.free;<span class="Apple-tab-span">     </span><span class="s7">// clean up</span></p>
  81 <p class="p7"><br></p>
  82 <p class="p7"><br></p>
  83 <p class="p7"><br></p>
  84 <p class="p7"><br></p>
  85 <p class="p9">// sending back the file position.</p>
  86 <p class="p9">// note:</p>
  87 <p class="p9">// the ugen knows nothing of the loop (apply a modulo).</p>
  88 <p class="p9">// if you load another file, you need to free the buffer and re-allocate it (see below)</p>
  89 <p class="p7"><br></p>
  90 <p class="p8">b = <span class="s3">Buffer</span>.cueSoundFile(s, <span class="s4">"sounds/a11wlk01-44_1.aiff"</span>, 0, 1, bufferSize: 4096);</p>
  91 <p class="p10"><span class="s5">c = </span><span class="s3">SoundFile</span><span class="s5">(</span>"sounds/a11wlk01-44_1.aiff"<span class="s5">).info;</span></p>
  92 <p class="p8">x = { <span class="s3">VDiskIn</span>.ar(1, b, <span class="s3">LFNoise2</span>.kr(0.2).range(0.2, 0.9), 1, sendID: 14) }.play;</p>
  93 <p class="p7"><br></p>
  94 <p class="p9">// register to receive this message</p>
  95 <p class="p7"><br></p>
  96 <p class="p8">(</p>
  97 <p class="p8">o = <span class="s3">OSCresponder</span>(s.addr,<span class="s6">'/diskin'</span>,{ <span class="s3">arg</span> time,responder,msg;</p>
  98 <p class="p8"><span class="Apple-tab-span">     </span><span class="s3">var</span> sendID = msg[2];</p>
  99 <p class="p8"><span class="Apple-tab-span">     </span><span class="s3">var</span> index = msg[3];</p>
 100 <p class="p8"><span class="Apple-tab-span">     </span>msg.postln;</p>
 101 <p class="p10"><span class="s5"><span class="Apple-tab-span">   </span></span>"id: % pos: % frames (% sec)\n"</p>
 102 <p class="p8"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>.postf(sendID, index % c.numFrames, (index % c.numFrames / c.sampleRate));</p>
 103 <p class="p8">}).add</p>
 104 <p class="p8">);</p>
 105 <p class="p7"><br></p>
 106 <p class="p8">b.close; b.free;</p>
 107 <p class="p7"><br></p>
 108 <p class="p10"><span class="s5">b.alloc; b.cueSoundFile(</span>"sounds/a11wlk01-44_1.aiff"<span class="s5">, 0); c = </span><span class="s3">SoundFile</span><span class="s5">(</span>"sounds/a11wlk01-44_1.aiff"<span class="s5">).info;</span></p>
 109 <p class="p7"><br></p>
 110 <p class="p8">x.free; b.close; b.free; o.remove; <span class="s7">// clean up eventually</span></p>
 111 <p class="p7"><br></p>
 112 <p class="p7"><br></p>
 113 <p class="p7"><br></p>
 114 <p class="p7"><br></p>
 115 <p class="p7"><br></p>
 116 <p class="p7"><br></p>
 117 <p class="p9">// the same example in OSC Messaging style, see [<span class="s8">Node Messaging</span>]</p>
 118 <p class="p7"><br></p>
 119 <p class="p9">// allocate a disk i/o buffer</p>
 120 <p class="p8">s.sendMsg(<span class="s4">"/b_alloc"</span>, 0, 65536, 1);</p>
 121 <p class="p7"><br></p>
 122 <p class="p9">// open an input file for this buffer, leave it open</p>
 123 <p class="p10"><span class="s5">s.sendMsg(</span>"/b_read"<span class="s5">, 0, </span>"sounds/a11wlk01-44_1.aiff"<span class="s5">, 0, 65536, 0, 1);</span></p>
 124 <p class="p7"><br></p>
 125 <p class="p9">// create a diskin node</p>
 126 <p class="p8">s.sendMsg(<span class="s4">"/s_new"</span>, <span class="s4">"help-VDiskin"</span>, x = s.nextNodeID, 1, 1);</p>
 127 <p class="p7"><br></p>
 128 <p class="p9"><span class="s5">s.sendMsg(</span><span class="s4">"/b_close"</span><span class="s5">, 0); </span>// close the file (very important!)</p>
 129 <p class="p7"><br></p>
 130 <p class="p7"><br></p>
 131 <p class="p9">// again<span class="Apple-converted-space"> </span></p>
 132 <p class="p9">// don't need to reallocate and Synth is still reading</p>
 133 <p class="p10"><span class="s5">s.sendMsg(</span>"/b_read"<span class="s5">, 0, </span>"sounds/a11wlk01-44_1.aiff"<span class="s5">, 0, 0, 0, 1);</span></p>
 134 <p class="p7"><br></p>
 135 <p class="p8">s.sendMsg(<span class="s4">"/n_free"</span>, x); <span class="s7">// stop reading</span></p>
 136 <p class="p7"><br></p>
 137 <p class="p9"><span class="s5">s.sendMsg(</span><span class="s4">"/b_close"</span><span class="s5">, 0); </span>// close the file.</p>
 138 <p class="p7"><br></p>
 139 <p class="p9"><span class="s5">s.sendMsg(</span><span class="s4">"/b_free"</span><span class="s5">, 0); </span>// frees the buffer</p>
 140 <p class="p7"><br></p>
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