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<section id="saving-list-of-floats-to-audio-file-on-disk">
<h1>Saving list of floats to audio file on disk<a class="headerlink" href="#saving-list-of-floats-to-audio-file-on-disk" title="Permalink to this heading">¶</a></h1>
<p><strong>01-list-to-audio-file.py</strong></p>
<p>This program generates 5 seconds of white noise with pure python function
and saves the samples in a file called noise.aif on the Desktop.</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> <a class="sphinx-codeautolink-a" href="../../api/functions/sndfile.html#pyo.savefile" title="pyo.savefile"><span class="n">savefile</span></a>
<span class="kn">from</span> <span class="nn">random</span> <span class="kn">import</span> <span class="n">uniform</span>
<span class="kn">import</span> <span class="nn">os</span>

<span class="c1"># Create the path for the audio file.</span>
<span class="n">home</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">expanduser</span><span class="p">(</span><span class="s2">"~"</span><span class="p">)</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">home</span><span class="p">,</span> <span class="s2">"Desktop"</span><span class="p">,</span> <span class="s2">"noise.aif"</span><span class="p">)</span>

<span class="c1"># Audio file properties (sampling rate, duration and number of channels).</span>
<span class="n">sr</span> <span class="o">=</span> <span class="mi">44100</span>
<span class="n">dur</span> <span class="o">=</span> <span class="mi">5</span>
<span class="n">chnls</span> <span class="o">=</span> <span class="mi">2</span>

<span class="c1"># Generate a list of `chnls` sub-lists with `sr * dur` floats in each of them.</span>
<span class="n">samples</span> <span class="o">=</span> <span class="p">[[</span><span class="n">uniform</span><span class="p">(</span><span class="o">-</span><span class="mf">0.5</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">)</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">sr</span> <span class="o">*</span> <span class="n">dur</span><span class="p">)]</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">chnls</span><span class="p">)]</span>

<span class="c1"># Save the list of floats in an audio file on disk.</span>
<a class="sphinx-codeautolink-a" href="../../api/functions/sndfile.html#pyo.savefile" title="pyo.savefile"><span class="n">savefile</span></a><span class="p">(</span><span class="n">samples</span><span class="o">=</span><span class="n">samples</span><span class="p">,</span> <span class="n">path</span><span class="o">=</span><span class="n">path</span><span class="p">,</span> <span class="n">sr</span><span class="o">=</span><span class="n">sr</span><span class="p">,</span> <span class="n">channels</span><span class="o">=</span><span class="n">chnls</span><span class="p">,</span> <span class="n">fileformat</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">sampletype</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
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