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<section id="record-streams-py-recording-individual-audio-streams-on-disk">
<h1>05-record-streams.py - Recording individual audio streams on disk.<a class="headerlink" href="#record-streams-py-recording-individual-audio-streams-on-disk" title="Permalink to this heading">¶</a></h1>
<p>The Record object can be used to record specific audio streams
from a performance. It can be useful to record a sound in mutiple
tracks to make post-processing on individual part easier. This
example record the bass, the mid and the higher part in three
separated files on the user’s desktop.</p>
<p>The <cite>fileformat</cite> and <cite>sampletype</cite> arguments are the same as in
the Server’s <cite>recordOptions</cite> method.</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="kn">import</span> <span class="nn">os</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"># Defines sound file paths.</span>
<span class="n">path</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">expanduser</span><span class="p">(</span><span class="s2">"~"</span><span class="p">),</span> <span class="s2">"Desktop"</span><span class="p">)</span>
<span class="n">bname</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="s2">"bass.wav"</span><span class="p">)</span>
<span class="n">mname</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="s2">"mid.wav"</span><span class="p">)</span>
<span class="n">hname</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="s2">"high.wav"</span><span class="p">)</span>
<span class="c1"># Creates an amplitude envelope</span>
<span class="n">amp</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/controls.html#pyo.Fader" title="pyo.lib.controls.Fader"><span class="n">Fader</span></a><span class="p">(</span><span class="n">fadein</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">fadeout</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">dur</span><span class="o">=</span><span class="mi">10</span><span class="p">,</span> <span class="n">mul</span><span class="o">=</span><span class="mf">0.3</span><span class="p">)</span><span class="o">.</span><span class="n">play</span><span class="p">()</span>
<span class="c1"># Bass voice</span>
<span class="n">blfo</span> <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="n">freq</span><span class="o">=</span><span class="p">[</span><span class="mf">0.15</span><span class="p">,</span> <span class="mf">0.16</span><span class="p">])</span><span class="o">.</span><span class="n">range</span><span class="p">(</span><span class="mi">78</span><span class="p">,</span> <span class="mi">82</span><span class="p">)</span>
<span class="n">bass</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.RCOsc" title="pyo.lib.generators.RCOsc"><span class="n">RCOsc</span></a><span class="p">(</span><span class="n">freq</span><span class="o">=</span><span class="n">blfo</span><span class="p">,</span> <span class="n">mul</span><span class="o">=</span><span class="n">amp</span><span class="p">)</span><span class="o">.</span><span class="n">out</span><span class="p">()</span>
<span class="c1"># Mid voice</span>
<span class="n">mlfo</span> <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="n">freq</span><span class="o">=</span><span class="p">[</span><span class="mf">0.18</span><span class="p">,</span> <span class="mf">0.19</span><span class="p">])</span><span class="o">.</span><span class="n">range</span><span class="p">(</span><span class="mf">0.24</span><span class="p">,</span> <span class="mf">0.26</span><span class="p">)</span>
<span class="n">mid</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.FM" title="pyo.lib.generators.FM"><span class="n">FM</span></a><span class="p">(</span><span class="n">carrier</span><span class="o">=</span><span class="mi">1600</span><span class="p">,</span> <span class="n">ratio</span><span class="o">=</span><span class="n">mlfo</span><span class="p">,</span> <span class="n">index</span><span class="o">=</span><span class="mi">5</span><span class="p">,</span> <span class="n">mul</span><span class="o">=</span><span class="n">amp</span> <span class="o">*</span> <span class="mf">0.3</span><span class="p">)</span><span class="o">.</span><span class="n">out</span><span class="p">()</span>
<span class="c1"># High voice</span>
<span class="n">hlfo</span> <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="n">freq</span><span class="o">=</span><span class="p">[</span><span class="mf">0.1</span><span class="p">,</span> <span class="mf">0.11</span><span class="p">,</span> <span class="mf">0.12</span><span class="p">,</span> <span class="mf">0.13</span><span class="p">])</span><span class="o">.</span><span class="n">range</span><span class="p">(</span><span class="mi">7000</span><span class="p">,</span> <span class="mi">8000</span><span class="p">)</span>
<span class="n">high</span> <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="n">freq</span><span class="o">=</span><span class="n">hlfo</span><span class="p">,</span> <span class="n">mul</span><span class="o">=</span><span class="n">amp</span> <span class="o">*</span> <span class="mf">0.1</span><span class="p">)</span><span class="o">.</span><span class="n">out</span><span class="p">()</span>
<span class="c1"># Creates the recorders</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/utils.html#pyo.Record" title="pyo.lib.utils.Record"><span class="n">brec</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/utils.html#pyo.Record" title="pyo.lib.utils.Record"><span class="n">Record</span></a><span class="p">(</span><span class="n">bass</span><span class="p">,</span> <span class="n">filename</span><span class="o">=</span><span class="n">bname</span><span class="p">,</span> <span class="n">chnls</span><span class="o">=</span><span class="mi">2</span><span class="p">,</span> <span class="n">fileformat</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">sampletype</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/utils.html#pyo.Record" title="pyo.lib.utils.Record"><span class="n">mrec</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/utils.html#pyo.Record" title="pyo.lib.utils.Record"><span class="n">Record</span></a><span class="p">(</span><span class="n">mid</span><span class="p">,</span> <span class="n">filename</span><span class="o">=</span><span class="n">mname</span><span class="p">,</span> <span class="n">chnls</span><span class="o">=</span><span class="mi">2</span><span class="p">,</span> <span class="n">fileformat</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">sampletype</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/utils.html#pyo.Record" title="pyo.lib.utils.Record"><span class="n">hrec</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/utils.html#pyo.Record" title="pyo.lib.utils.Record"><span class="n">Record</span></a><span class="p">(</span><span class="n">high</span><span class="p">,</span> <span class="n">filename</span><span class="o">=</span><span class="n">hname</span><span class="p">,</span> <span class="n">chnls</span><span class="o">=</span><span class="mi">2</span><span class="p">,</span> <span class="n">fileformat</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">sampletype</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
<span class="c1"># After 10.1 seconds, recorder objects will be automatically deleted.</span>
<span class="c1"># This will trigger their stop method and properly close the sound files.</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/utils.html#pyo.Clean_objects" title="pyo.lib.utils.Clean_objects"><span class="n">clean</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/utils.html#pyo.Clean_objects" title="pyo.lib.utils.Clean_objects"><span class="n">Clean_objects</span></a><span class="p">(</span><span class="mf">10.1</span><span class="p">,</span> <a class="sphinx-codeautolink-a" href="../../api/classes/utils.html#pyo.Record" title="pyo.lib.utils.Record"><span class="n">brec</span></a><span class="p">,</span> <a class="sphinx-codeautolink-a" href="../../api/classes/utils.html#pyo.Record" title="pyo.lib.utils.Record"><span class="n">mrec</span></a><span class="p">,</span> <a class="sphinx-codeautolink-a" href="../../api/classes/utils.html#pyo.Record" title="pyo.lib.utils.Record"><span class="n">hrec</span></a><span class="p">)</span>
<span class="c1"># Starts the internal timer of Clean_objects. Use its own thread.</span>
<span class="n">clean</span><span class="o">.</span><span class="n">start</span><span class="p">()</span>
<span class="c1"># Starts the Server, in order to be sync with the cleanup process.</span>
<span class="n">s</span><span class="o">.</span><span class="n">start</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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