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<section id="sine-tone-py-the-hello-world-of-audio-programming">
<h1>02-sine-tone.py - The “hello world” of audio programming!<a class="headerlink" href="#sine-tone-py-the-hello-world-of-audio-programming" title="Permalink to this heading">¶</a></h1>
<p>This script simply plays a 1000 Hz sine tone.</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="c1"># Creates and boots the server.</span>
<span class="c1"># The user should send the "start" command from the GUI.</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"># Drops the gain by 20 dB.</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 player.</span>
<span class="c1"># The out() method starts the processing</span>
<span class="c1"># and sends the signal to the output.</span>
<span class="n">a</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="o">.</span><span class="n">out</span><span class="p">()</span>
<span class="c1"># Opens the server graphical interface.</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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