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<section id="retrieving-current-value-of-a-pyoobject-as-a-python-float">
<h1>Retrieving current value of a PyoObject as a python float<a class="headerlink" href="#retrieving-current-value-of-a-pyoobject-as-a-python-float" title="Permalink to this heading">¶</a></h1>
<p><strong>02-get-method.py</strong></p>
<p>The get() method of the PyoObject allow the user to retrieve the current
value of an audio signal as a python float. This can useful if one wants
to use an audio signal to drive an algorithm written in pure python.</p>
<p>If the <cite>all</cite> argument of the get() method is True, it will return a list
with the current value of all streams managed by the object. If False (the
default), te value of the first audio stream will be returned as a float:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">lfos</span> <span class="o">=</span> <span class="n">Sine</span><span class="p">(</span><span class="n">freq</span><span class="o">=</span><span class="p">[</span><span class="mf">.1</span><span class="p">,</span><span class="mf">.2</span><span class="p">,</span><span class="mf">.4</span><span class="p">,</span><span class="mf">.3</span><span class="p">],</span> <span class="n">mul</span><span class="o">=</span><span class="mi">100</span><span class="p">,</span> <span class="n">add</span><span class="o">=</span><span class="mi">500</span><span class="p">)</span>
<span class="n">synth</span> <span class="o">=</span> <span class="n">SineLoop</span><span class="p">(</span><span class="n">freq</span><span class="o">=</span><span class="n">lfos</span><span class="p">,</span> <span class="n">feedback</span><span class="o">=</span><span class="mf">.07</span><span class="p">,</span> <span class="n">mul</span><span class="o">=</span><span class="mf">.05</span><span class="p">)</span><span class="o">.</span><span class="n">out</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">print_val</span><span class="p">():</span>
<span class="c1"># Print all four frequencies assigned to SineLoop's freq argument</span>
<span class="nb">print</span><span class="p">(</span><span class="n">lfos</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="nb">all</span><span class="o">=</span><span class="kc">True</span><span class="p">))</span>
<span class="n">pat</span> <span class="o">=</span> <span class="n">Pattern</span><span class="p">(</span><span class="n">print_val</span><span class="p">,</span> <span class="mf">.25</span><span class="p">)</span><span class="o">.</span><span class="n">play</span><span class="p">()</span>
</pre></div>
</div>
<section id="complete-example">
<h2>Complete example<a class="headerlink" href="#complete-example" title="Permalink to this heading">¶</a></h2>
<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="n">duplex</span><span class="o">=</span><span class="mi">0</span><span class="p">)</span><span class="o">.</span><span class="n">boot</span><span class="p">()</span>
<span class="n">t</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/tables.html#pyo.CurveTable" title="pyo.lib.tables.CurveTable"><span class="n">CurveTable</span></a><span class="p">([(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">),</span> <span class="p">(</span><span class="mi">2048</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">),</span> <span class="p">(</span><span class="mi">4096</span><span class="p">,</span> <span class="mf">0.2</span><span class="p">),</span> <span class="p">(</span><span class="mi">6144</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">),</span> <span class="p">(</span><span class="mi">8192</span><span class="p">,</span> <span class="mi">0</span><span class="p">)],</span> <span class="n">tension</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">bias</span><span class="o">=</span><span class="mi">20</span><span class="p">)</span><span class="o">.</span><span class="n">normalize</span><span class="p">()</span>
<span class="n">t</span><span class="o">.</span><span class="n">view</span><span class="p">(</span><span class="n">title</span><span class="o">=</span><span class="s2">"LFO Waveform"</span><span class="p">)</span>
<span class="c1"># LFO applied on amplitude value of the synths.</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/tableprocess.html#pyo.Osc" title="pyo.lib.tableprocess.Osc"><span class="n">a</span></a> <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><span class="n">t</span><span class="p">,</span> <span class="n">freq</span><span class="o">=</span><span class="mi">2</span><span class="p">,</span> <span class="n">mul</span><span class="o">=</span><span class="mf">0.1</span><span class="p">)</span>
<span class="c1"># Make some modulated noise...</span>
<span class="n">synth1</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.BrownNoise" title="pyo.lib.generators.BrownNoise"><span class="n">BrownNoise</span></a><span class="p">(</span><a class="sphinx-codeautolink-a" href="../../api/classes/tableprocess.html#pyo.Osc" title="pyo.lib.tableprocess.Osc"><span class="n">a</span></a><span class="p">)</span><span class="o">.</span><span class="n">mix</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span><span class="o">.</span><span class="n">out</span><span class="p">()</span>
<span class="n">synth2</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="p">[</span><span class="mi">100</span><span class="p">,</span> <span class="mi">50</span><span class="p">],</span> <span class="n">ratio</span><span class="o">=</span><span class="p">[</span><span class="mf">0.495</span><span class="p">,</span> <span class="mf">1.01</span><span class="p">],</span> <span class="n">index</span><span class="o">=</span><span class="mi">10</span><span class="p">,</span> <span class="n">mul</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">a</span></a><span class="p">)</span><span class="o">.</span><span class="n">out</span><span class="p">()</span>
<span class="c1"># Oscillator from which to get values to modify the shape of the LFO waveform.</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.Sine" title="pyo.lib.generators.Sine"><span class="n">c</span></a> <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="mf">0.1</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">10</span><span class="p">,</span> <span class="mi">10</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">change</span><span class="p">():</span>
<span class="c1"># Get the current value of the oscillator.</span>
<span class="n">val</span> <span class="o">=</span> <span class="n">c</span><span class="o">.</span><span class="n">get</span><span class="p">()</span>
<span class="c1"># Print the value to the console.</span>
<span class="nb">print</span><span class="p">(</span><span class="s2">"Current oscillator value:"</span><span class="p">,</span> <span class="n">val</span><span class="p">)</span>
<span class="c1"># Change the bias of the curve and normalize the table.</span>
<span class="n">t</span><span class="o">.</span><span class="n">setBias</span><span class="p">(</span><span class="n">val</span><span class="p">)</span>
<span class="n">t</span><span class="o">.</span><span class="n">normalize</span><span class="p">()</span>
<span class="c1"># Call change() function 10 times per second.</span>
<span class="n">p</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/pattern.html#pyo.Pattern" title="pyo.lib.pattern.Pattern"><span class="n">Pattern</span></a><span class="p">(</span><span class="n">change</span><span class="p">,</span> <span class="mf">0.1</span><span class="p">)</span><span class="o">.</span><span class="n">play</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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