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<section id="parallel-proc-py-multiple-processes-on-a-single-source">
<h1>03-parallel-proc.py - Multiple processes on a single source.<a class="headerlink" href="#parallel-proc-py-multiple-processes-on-a-single-source" title="Permalink to this heading">¶</a></h1>
<p>This example shows how to play different audio objects side-by-side.
Every processing object (ie the ones that modify an audio source) have
a first argument called “input”. This argument takes the audio object
to process.</p>
<p>Note the input variable given to each processing object and the call
to the out() method of each object that should send its samples to the
output.</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="n">s</span><span class="o">.</span><span class="n">amp</span> <span class="o">=</span> <span class="mf">0.1</span>
<span class="c1"># Creates a sine wave as the source to process.</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.Sine" title="pyo.lib.generators.Sine"><span class="n">a</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.Sine" title="pyo.lib.generators.Sine"><span class="n">Sine</span></a><span class="p">()</span>
<span class="c1"># Passes the sine wave through an harmonizer.</span>
<span class="n">hr</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/effects.html#pyo.Harmonizer" title="pyo.lib.effects.Harmonizer"><span class="n">Harmonizer</span></a><span class="p">(</span><a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.Sine" title="pyo.lib.generators.Sine"><span class="n">a</span></a><span class="p">)</span><span class="o">.</span><span class="n">out</span><span class="p">()</span>
<span class="c1"># Also through a chorus.</span>
<span class="n">ch</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/effects.html#pyo.Chorus" title="pyo.lib.effects.Chorus"><span class="n">Chorus</span></a><span class="p">(</span><a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.Sine" title="pyo.lib.generators.Sine"><span class="n">a</span></a><span class="p">)</span><span class="o">.</span><span class="n">out</span><span class="p">()</span>
<span class="c1"># And through a frequency shifter.</span>
<span class="n">sh</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/effects.html#pyo.FreqShift" title="pyo.lib.effects.FreqShift"><span class="n">FreqShift</span></a><span class="p">(</span><a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.Sine" title="pyo.lib.generators.Sine"><span class="n">a</span></a><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>
</pre></div>
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