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<section id="receiving-open-sound-control-messages-as-audio-streams">
<h1>Receiving Open Sound Control messages as audio streams<a class="headerlink" href="#receiving-open-sound-control-messages-as-audio-streams" title="Permalink to this heading">¶</a></h1>
<p><strong>02-receive-streams.py</strong></p>
<p>This script shows a granulation process controlled by OSC messages
coming from another program (run the next example, <em>03-send-streams.py</em>,
to get values coming in).</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"># The sound table to granulate.</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/tables.html#pyo.SndTable" title="pyo.lib.tables.SndTable"><span class="n">table</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/tables.html#pyo.SndTable" title="pyo.lib.tables.SndTable"><span class="n">SndTable</span></a><span class="p">(</span><span class="s2">"../snds/flute.aif"</span><span class="p">)</span>
<span class="c1"># Listen addresses '/density', '/position', '/pitch_rand' and '/duration' on port 9000.</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/opensndctrl.html#pyo.OscReceive" title="pyo.lib.opensndctrl.OscReceive"><span class="n">rec</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/opensndctrl.html#pyo.OscReceive" title="pyo.lib.opensndctrl.OscReceive"><span class="n">OscReceive</span></a><span class="p">(</span><span class="n">port</span><span class="o">=</span><span class="mi">9000</span><span class="p">,</span> <span class="n">address</span><span class="o">=</span><span class="p">[</span><span class="s2">"/density"</span><span class="p">,</span> <span class="s2">"/position"</span><span class="p">,</span> <span class="s2">"/pitch_rand"</span><span class="p">,</span> <span class="s2">"/duration"</span><span class="p">])</span>
<span class="c1"># Sets initial values for the OSC streams. This allow the program to run with</span>
<span class="c1"># minimal behaviour even if no message have been sent on these addresses.</span>
<span class="n">rec</span><span class="o">.</span><span class="n">setValue</span><span class="p">(</span><span class="s2">"/density"</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">)</span>
<span class="n">rec</span><span class="o">.</span><span class="n">setValue</span><span class="p">(</span><span class="s2">"/position"</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">)</span>
<span class="n">rec</span><span class="o">.</span><span class="n">setValue</span><span class="p">(</span><span class="s2">"/pitch_rand"</span><span class="p">,</span> <span class="mf">0.0</span><span class="p">)</span>
<span class="n">rec</span><span class="o">.</span><span class="n">setValue</span><span class="p">(</span><span class="s2">"/duration"</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">)</span>
<span class="c1"># Density of grains, between 1 and 250 grains per second.</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/controls.html#pyo.SigTo" title="pyo.lib.controls.SigTo"><span class="n">dens</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/controls.html#pyo.SigTo" title="pyo.lib.controls.SigTo"><span class="n">SigTo</span></a><span class="p">(</span><a class="sphinx-codeautolink-a" href="../../api/classes/opensndctrl.html#pyo.OscReceive" title="pyo.lib.opensndctrl.OscReceive"><span class="n">rec</span></a><span class="p">[</span><span class="s2">"/density"</span><span class="p">],</span> <span class="n">time</span><span class="o">=</span><span class="mf">0.05</span><span class="p">,</span> <span class="n">mul</span><span class="o">=</span><span class="mi">249</span><span class="p">,</span> <span class="n">add</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
<span class="c1"># Reading position, in samples, in the table + little jitter noise.</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/controls.html#pyo.SigTo" title="pyo.lib.controls.SigTo"><span class="n">pos</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/controls.html#pyo.SigTo" title="pyo.lib.controls.SigTo"><span class="n">SigTo</span></a><span class="p">(</span><a class="sphinx-codeautolink-a" href="../../api/classes/opensndctrl.html#pyo.OscReceive" title="pyo.lib.opensndctrl.OscReceive"><span class="n">rec</span></a><span class="p">[</span><span class="s2">"/position"</span><span class="p">],</span> <span class="n">time</span><span class="o">=</span><span class="mf">0.05</span><span class="p">,</span> <span class="n">mul</span><span class="o">=</span><span class="n">table</span><span class="o">.</span><span class="n">getSize</span><span class="p">(),</span> <span class="n">add</span><span class="o">=</span><a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.Noise" title="pyo.lib.generators.Noise"><span class="n">Noise</span></a><span class="p">(</span><span class="mi">100</span><span class="p">))</span>
<span class="c1"># Amplitude of a jitter noise around 1.0 to control the pitch of individual grains.</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/controls.html#pyo.SigTo" title="pyo.lib.controls.SigTo"><span class="n">rpit</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/controls.html#pyo.SigTo" title="pyo.lib.controls.SigTo"><span class="n">SigTo</span></a><span class="p">(</span><a class="sphinx-codeautolink-a" href="../../api/classes/opensndctrl.html#pyo.OscReceive" title="pyo.lib.opensndctrl.OscReceive"><span class="n">rec</span></a><span class="p">[</span><span class="s2">"/pitch_rand"</span><span class="p">],</span> <span class="n">time</span><span class="o">=</span><span class="mf">0.05</span><span class="p">,</span> <span class="n">mul</span><span class="o">=</span><span class="mf">0.2</span><span class="p">,</span> <span class="n">add</span><span class="o">=</span><span class="mf">0.001</span><span class="p">)</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.Noise" title="pyo.lib.generators.Noise"><span class="n">pit</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.Noise" title="pyo.lib.generators.Noise"><span class="n">Noise</span></a><span class="p">(</span><span class="n">mul</span><span class="o">=</span><a class="sphinx-codeautolink-a" href="../../api/classes/controls.html#pyo.SigTo" title="pyo.lib.controls.SigTo"><span class="n">rpit</span></a><span class="p">,</span> <span class="n">add</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
<span class="c1"># Grain duration, between 0.025 and 0.5 second.</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/controls.html#pyo.SigTo" title="pyo.lib.controls.SigTo"><span class="n">dur</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/controls.html#pyo.SigTo" title="pyo.lib.controls.SigTo"><span class="n">SigTo</span></a><span class="p">(</span><a class="sphinx-codeautolink-a" href="../../api/classes/opensndctrl.html#pyo.OscReceive" title="pyo.lib.opensndctrl.OscReceive"><span class="n">rec</span></a><span class="p">[</span><span class="s2">"/duration"</span><span class="p">],</span> <span class="n">time</span><span class="o">=</span><span class="mf">0.05</span><span class="p">,</span> <span class="n">mul</span><span class="o">=</span><span class="mf">0.475</span><span class="p">,</span> <span class="n">add</span><span class="o">=</span><span class="mf">0.025</span><span class="p">)</span>
<span class="n">grain</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/tableprocess.html#pyo.Particle" title="pyo.lib.tableprocess.Particle"><span class="n">Particle</span></a><span class="p">(</span>
<span class="n">table</span><span class="o">=</span><a class="sphinx-codeautolink-a" href="../../api/classes/tables.html#pyo.SndTable" title="pyo.lib.tables.SndTable"><span class="n">table</span></a><span class="p">,</span> <span class="c1"># table to read samples from.</span>
<span class="n">env</span><span class="o">=</span><a class="sphinx-codeautolink-a" href="../../api/classes/tables.html#pyo.HannTable" title="pyo.lib.tables.HannTable"><span class="n">HannTable</span></a><span class="p">(),</span> <span class="c1"># grain envelope.</span>
<span class="n">dens</span><span class="o">=</span><a class="sphinx-codeautolink-a" href="../../api/classes/controls.html#pyo.SigTo" title="pyo.lib.controls.SigTo"><span class="n">dens</span></a><span class="p">,</span> <span class="c1"># density of grains per second.</span>
<span class="n">pitch</span><span class="o">=</span><a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.Noise" title="pyo.lib.generators.Noise"><span class="n">pit</span></a><span class="p">,</span> <span class="c1"># pitch of grains.</span>
<span class="n">pos</span><span class="o">=</span><a class="sphinx-codeautolink-a" href="../../api/classes/controls.html#pyo.SigTo" title="pyo.lib.controls.SigTo"><span class="n">pos</span></a><span class="p">,</span> <span class="c1"># position in the table where to start the grain.</span>
<span class="n">dur</span><span class="o">=</span><a class="sphinx-codeautolink-a" href="../../api/classes/controls.html#pyo.SigTo" title="pyo.lib.controls.SigTo"><span class="n">dur</span></a><span class="p">,</span> <span class="c1"># grain duration.</span>
<span class="n">dev</span><span class="o">=</span><span class="mf">0.01</span><span class="p">,</span> <span class="c1"># Maximum deviation of the starting time of the grain.</span>
<span class="n">pan</span><span class="o">=</span><a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.Noise" title="pyo.lib.generators.Noise"><span class="n">Noise</span></a><span class="p">(</span><span class="mf">0.5</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">),</span> <span class="c1"># Panning factor of the grain.</span>
<span class="n">chnls</span><span class="o">=</span><span class="mi">2</span><span class="p">,</span> <span class="c1"># Number of channels to output.</span>
<span class="n">mul</span><span class="o">=</span><span class="mf">0.15</span><span class="p">,</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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