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<section id="math-ops-py-audio-objects-and-arithmetic-expresssions">
<h1>05-math-ops.py - Audio objects and arithmetic expresssions.<a class="headerlink" href="#math-ops-py-audio-objects-and-arithmetic-expresssions" title="Permalink to this heading">¶</a></h1>
<p>This script shows how a PyoObject reacts when used inside an
arithmetic expression.</p>
<p>Multiplication, addition, division and substraction can be applied
between pyo objects or between pyo objects and numbers. Doing so
returns a Dummy object that outputs the result of the operation.</p>
<p>A Dummy object is only a place holder to keep track of arithmetic
operations on audio objects.</p>
<p>PyoObject can also be used in expression with the exponent (**),
modulo (%) and unary negative (-) operators.</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">s</span><span class="o">.</span><span class="n">amp</span> <span class="o">=</span> <span class="mf">0.1</span>
<span class="c1"># Full scale sine wave</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.Sine" title="pyo.lib.generators.Sine"><span class="n">a</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="c1"># Creates a Dummy object `b` with `mul` attribute</span>
<span class="c1"># set to 0.5 and leaves `a` unchanged.</span>
<span class="n">b</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">a</span></a> <span class="o">*</span> <span class="mf">0.5</span>
<span class="n">b</span><span class="o">.</span><span class="n">out</span><span class="p">()</span>
<span class="c1"># Instance of Dummy class</span>
<span class="nb">print</span><span class="p">(</span><span class="n">b</span><span class="p">)</span>
<span class="c1"># Computes a ring modulation between two PyoObjects</span>
<span class="c1"># and scales the amplitude of the resulting signal.</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="mi">300</span><span class="p">)</span>
<span class="n">d</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">a</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">c</span></a> <span class="o">*</span> <span class="mf">0.3</span>
<span class="n">d</span><span class="o">.</span><span class="n">out</span><span class="p">()</span>
<span class="c1"># PyoObject can be used with Exponent operator.</span>
<span class="n">e</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">c</span></a> <span class="o">**</span> <span class="mi">10</span> <span class="o">*</span> <span class="mf">0.4</span>
<span class="n">e</span><span class="o">.</span><span class="n">out</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<span class="c1"># Displays the ringmod and the rectified signals.</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/analysis.html#pyo.Spectrum" title="pyo.lib.analysis.Spectrum"><span class="n">sp</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/analysis.html#pyo.Spectrum" title="pyo.lib.analysis.Spectrum"><span class="n">Spectrum</span></a><span class="p">([</span><span class="n">d</span><span class="p">,</span> <span class="n">e</span><span class="p">])</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/analysis.html#pyo.Scope" title="pyo.lib.analysis.Scope"><span class="n">sc</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/analysis.html#pyo.Scope" title="pyo.lib.analysis.Scope"><span class="n">Scope</span></a><span class="p">([</span><span class="n">d</span><span class="p">,</span> <span class="n">e</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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