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<section id="multichannel-expansion-2-py-extended-multichannel-expansion">
<h1>07-multichannel-expansion-2.py - Extended multichannel expansion.<a class="headerlink" href="#multichannel-expansion-2-py-extended-multichannel-expansion" title="Permalink to this heading">¶</a></h1>
<p>When using multichannel expansion with lists of different lengths,
the longer list is used to set the number of streams and smaller
lists will be wrap-around to fill the holes.</p>
<p>This feature is very useful to create complex sonorities.</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <a class="sphinx-codeautolink-a" href="../../api/alphabetical.html#module-pyo" title="pyo"><span class="nn">pyo</span></a> <span class="kn">import</span> <span class="o">*</span>

<span class="n">s</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/server.html#pyo.Server" title="pyo.lib.server.Server"><span class="n">Server</span></a><span class="p">()</span><span class="o">.</span><span class="n">boot</span><span class="p">()</span>

<span class="c1"># 12 streams with different combinations of `freq` and `ratio`.</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.SumOsc" title="pyo.lib.generators.SumOsc"><span class="n">a</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.SumOsc" title="pyo.lib.generators.SumOsc"><span class="n">SumOsc</span></a><span class="p">(</span>
    <span class="n">freq</span><span class="o">=</span><span class="p">[</span><span class="mi">100</span><span class="p">,</span> <span class="mf">150.2</span><span class="p">,</span> <span class="mf">200.5</span><span class="p">,</span> <span class="mf">250.7</span><span class="p">],</span>
    <span class="n">ratio</span><span class="o">=</span><span class="p">[</span><span class="mf">0.501</span><span class="p">,</span> <span class="mf">0.753</span><span class="p">,</span> <span class="mf">1.255</span><span class="p">],</span>
    <span class="n">index</span><span class="o">=</span><span class="p">[</span><span class="mf">0.3</span><span class="p">,</span> <span class="mf">0.4</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">,</span> <span class="mf">0.6</span><span class="p">,</span> <span class="mf">0.7</span><span class="p">,</span> <span class="mf">0.4</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">,</span> <span class="mf">0.3</span><span class="p">,</span> <span class="mf">0.6</span><span class="p">,</span> <span class="mf">0.7</span><span class="p">,</span> <span class="mf">0.3</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">],</span>
    <span class="n">mul</span><span class="o">=</span><span class="mf">0.05</span><span class="p">,</span>
<span class="p">)</span>

<span class="c1"># Adds a stereo reverberation to the signal</span>
<span class="n">rev</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/effects.html#pyo.Freeverb" title="pyo.lib.effects.Freeverb"><span class="n">Freeverb</span></a><span class="p">(</span><span class="n">a</span><span class="o">.</span><span class="n">mix</span><span class="p">(</span><span class="mi">2</span><span class="p">),</span> <span class="n">size</span><span class="o">=</span><span class="mf">0.80</span><span class="p">,</span> <span class="n">damp</span><span class="o">=</span><span class="mf">0.70</span><span class="p">,</span> <span class="n">bal</span><span class="o">=</span><span class="mf">0.30</span><span class="p">)</span><span class="o">.</span><span class="n">out</span><span class="p">()</span>

<span class="n">s</span><span class="o">.</span><span class="n">gui</span><span class="p">(</span><span class="nb">locals</span><span class="p">())</span>
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