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<section id="read-from-ram-py-soundfile-playback-from-ram">
<h1>03-read-from-ram.py - Soundfile playback from RAM.<a class="headerlink" href="#read-from-ram-py-soundfile-playback-from-ram" title="Permalink to this heading">¶</a></h1>
<p>Reading a sound file from the RAM gives the advantage of a very
fast access to every loaded samples. This is very useful for a
lot of processes, such as granulation, looping, creating envelopes
and waveforms and many others.</p>
<p>The simplest way of loading a sound in RAM is to use the SndTable
object. This example loads a sound file and reads it in loop.
We will see some more evolved processes later…</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">path</span> <span class="o">=</span> <span class="n">SNDS_PATH</span> <span class="o">+</span> <span class="s2">"/transparent.aif"</span>
<span class="c1"># Loads the sound file in RAM. Beginning and ending points</span>
<span class="c1"># can be controlled with "start" and "stop" arguments.</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/tables.html#pyo.SndTable" title="pyo.lib.tables.SndTable"><span class="n">t</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="n">path</span><span class="p">)</span>
<span class="c1"># Gets the frequency relative to the table length.</span>
<span class="n">freq</span> <span class="o">=</span> <span class="n">t</span><span class="o">.</span><span class="n">getRate</span><span class="p">()</span>
<span class="c1"># Simple stereo looping playback (right channel is 180 degrees out-of-phase).</span>
<span class="n">osc</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/tableprocess.html#pyo.Osc" title="pyo.lib.tableprocess.Osc"><span class="n">Osc</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">t</span></a><span class="p">,</span> <span class="n">freq</span><span class="o">=</span><span class="n">freq</span><span class="p">,</span> <span class="n">phase</span><span class="o">=</span><span class="p">[</span><span class="mi">0</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">0.4</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>
</pre></div>
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