Help/Other Topics/Non-Realtime-Synthesis.html

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  28 <p class="p1"><b>Non-Realtime Synthesis</b></p>
  29 <p class="p2"><br></p>
  30 <p class="p3">This documentation is initial.</p>
  31 <p class="p2"><br></p>
  32 <p class="p3">SuperCollider 3 supports non-realtime synthesis through the use of binary files of OSC commands.</p>
  33 <p class="p2"><br></p>
  34 <p class="p3">First create an OSC command file (i.e. a score)</p>
  35 <p class="p2"><br></p>
  36 <p class="p4"><span class="s1">f = </span><span class="s2">File</span><span class="s1">(</span>"Cmds.osc"<span class="s1">,</span>"w"<span class="s1">);</span></p>
  37 <p class="p5"><br></p>
  38 <p class="p6">// start a sine oscillator at 0.2 seconds.</p>
  39 <p class="p7">c = [ 0.2, [<span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1001, 0, 0]].asRawOSC;</p>
  40 <p class="p6"><span class="s1">f.write(c.size); </span>// each bundle is preceeded by a 32 bit size.</p>
  41 <p class="p6"><span class="s1">f.write(c); </span>// write the bundle data.</p>
  42 <p class="p5"><br></p>
  43 <p class="p6">// stop sine oscillator at 3.0 seconds.</p>
  44 <p class="p7">c = [ 3.0, [<span class="s3">\n_free</span>, 1001]].asRawOSC;</p>
  45 <p class="p7">f.write(c.size);</p>
  46 <p class="p7">f.write(c);</p>
  47 <p class="p5"><br></p>
  48 <p class="p6">// scsynth stops processing immediately after the last command, so here is</p>
  49 <p class="p6">// a do-nothing command to mark the end of the command stream.</p>
  50 <p class="p7">c = [ 3.2, [<span class="s3">0</span>]].asRawOSC;</p>
  51 <p class="p7">f.write(c.size);</p>
  52 <p class="p7">f.write(c);</p>
  53 <p class="p5"><br></p>
  54 <p class="p7">f.close;</p>
  55 <p class="p2"><br></p>
  56 <p class="p6">// the 'NRTsine' SynthDef</p>
  57 <p class="p7">(</p>
  58 <p class="p7"><span class="s2">SynthDef</span>(<span class="s4">"NRTsine"</span>,{ <span class="s2">arg</span> freq = 440;</p>
  59 <p class="p7"><span class="Apple-tab-span">     </span><span class="s2">Out</span>.ar(0,</p>
  60 <p class="p7"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span> <span class="s2">SinOsc</span>.ar(freq, 0, 0.2)</p>
  61 <p class="p7"><span class="Apple-tab-span">     </span>)</p>
  62 <p class="p7">}).writeDefFile;</p>
  63 <p class="p7">)</p>
  64 <p class="p2"><br></p>
  65 <p class="p3">then on the command line (i.e. in Terminal):</p>
  66 <p class="p2"><br></p>
  67 <p class="p3">./scsynth -N Cmds.osc _ NRTout.aiff 44100 AIFF int16</p>
  68 <p class="p2"><br></p>
  69 <p class="p3">The command line arguments are:</p>
  70 <p class="p2"><br></p>
  71 <p class="p3"><span class="Apple-converted-space">    </span>-N &lt;cmd-filename&gt; &lt;input-filename&gt; &lt;output-filename&gt; &lt;sample-rate&gt; &lt;header-format&gt; &lt;sample-format&gt; <span class="Apple-tab-span">     </span>&lt;...other scsynth arguments&gt;</p>
  72 <p class="p2"><br></p>
  73 <p class="p3">If you do not need an input sound file, then put "_" for the file name as in the example above.</p>
  74 <p class="p2"><br></p>
  75 <p class="p3">For details on other valid arguments to the scsynth app see <a href="../ServerArchitecture/Server-Architecture.html"><span class="s5">Server-Architecture</span></a>.</p>
  76 <p class="p2"><br></p>
  77 <p class="p3">This could be executed in SC as:</p>
  78 <p class="p2"><br></p>
  79 <p class="p4">"./scsynth -N Cmds.osc _ NRTout.aiff 44100 AIFF int16 -o 1"<span class="s1">.unixCmd; </span><span class="s6">// -o 1 is mono output</span></p>
  80 <p class="p2"><br></p>
  81 <p class="p3">A more powerful option is to use the <b>Score </b>object, which has convenience methods to create OSC command files and do nrt synthesis. See the <a href="../Control/Score.html"><span class="s5">Score</span></a><b> </b>helpfile for more details.</p>
  82 <p class="p2"><br></p>
  83 <p class="p2"><br></p>
  84 <p class="p7">(</p>
  85 <p class="p7">x = [</p>
  86 <p class="p5"><br></p>
  87 <p class="p7">[0.0, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1000, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 1413 ]],</p>
  88 <p class="p7">[0.1, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1001, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 712 ]],</p>
  89 <p class="p7">[0.2, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1002, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 417 ]],</p>
  90 <p class="p7">[0.3, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1003, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 1238 ]],</p>
  91 <p class="p7">[0.4, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1004, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 996 ]],</p>
  92 <p class="p7">[0.5, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1005, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 1320 ]],</p>
  93 <p class="p7">[0.6, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1006, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 864 ]],</p>
  94 <p class="p7">[0.7, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1007, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 1033 ]],</p>
  95 <p class="p7">[0.8, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1008, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 1693 ]],</p>
  96 <p class="p7">[0.9, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1009, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 410 ]],</p>
  97 <p class="p7">[1.0, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1010, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 1349 ]],</p>
  98 <p class="p7">[1.1, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1011, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 1449 ]],</p>
  99 <p class="p7">[1.2, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1012, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 1603 ]],</p>
 100 <p class="p7">[1.3, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1013, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 333 ]],</p>
 101 <p class="p7">[1.4, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1014, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 678 ]],</p>
 102 <p class="p7">[1.5, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1015, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 503 ]],</p>
 103 <p class="p7">[1.6, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1016, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 820 ]],</p>
 104 <p class="p7">[1.7, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1017, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 1599 ]],</p>
 105 <p class="p7">[1.8, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1018, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 968 ]],</p>
 106 <p class="p7">[1.9, [ <span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1019, 0, 0,<span class="Apple-converted-space">  </span><span class="s3">\freq</span>, 1347 ]],</p>
 107 <p class="p5"><br></p>
 108 <p class="p7">[3.0, [<span class="s3">\c_set</span>, 0, 0]]<span class="Apple-converted-space"> </span></p>
 109 <p class="p7">];</p>
 110 <p class="p7">)</p>
 111 <p class="p8"><br></p>
 112 <p class="p3">You can then use Score.write to convert the above to the OSC command file as follows:</p>
 113 <p class="p2"><br></p>
 114 <p class="p4"><span class="s2">Score</span><span class="s1">.write(x, </span>"score-test.osc"<span class="s1">);</span></p>
 115 <p class="p4">"./scsynth -N score-test.osc _ score-test.aiff 44100 AIFF int16 -o 1"<span class="s1">.unixCmd;</span></p>
 116 <p class="p2"><br></p>
 117 <p class="p3">Score also provides methods to do nrt synthesis directly:</p>
 118 <p class="p5"><br></p>
 119 <p class="p7">(</p>
 120 <p class="p7"><span class="s2">var</span> f, o;</p>
 121 <p class="p7">g = [</p>
 122 <p class="p7"><span class="Apple-tab-span">     </span>[0.1, [<span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1000, 0, 0, <span class="s3">\freq</span>, 440]],<span class="Apple-tab-span">  </span></p>
 123 <p class="p7"><span class="Apple-tab-span">     </span>[0.2, [<span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1001, 0, 0, <span class="s3">\freq</span>, 660]],</p>
 124 <p class="p7"><span class="Apple-tab-span">     </span>[0.3, [<span class="s3">\s_new</span>, <span class="s3">\NRTsine</span>, 1002, 0, 0, <span class="s3">\freq</span>, 220]],</p>
 125 <p class="p7"><span class="Apple-tab-span">     </span>[1, [<span class="s3">\c_set</span>, 0, 0]]</p>
 126 <p class="p7"><span class="Apple-tab-span">     </span>];</p>
 127 <p class="p7">o = <span class="s2">ServerOptions</span>.new.numOutputBusChannels = 1; <span class="s6">// mono output</span></p>
 128 <p class="p4"><span class="s2">Score</span><span class="s1">.recordNRT(g, </span>"help-oscFile.osc"<span class="s1">, </span>"helpNRT.aiff"<span class="s1">, options: o); </span><span class="s6">// synthesize</span></p>
 129 <p class="p7">)</p>
 130 </body>
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