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<section id="using-audio-objects-py-using-audio-objects-as-generators">
<h1>13-using-audio-objects.py - Using audio objects as generators.<a class="headerlink" href="#using-audio-objects-py-using-audio-objects-as-generators" title="Permalink to this heading">¶</a></h1>
<p>Because Events computes its events in real time, it is possible to use
the current value of audio streams as generators for parameter (even
as generators for EventGenerator’s arguments). So, wherever a float or
an EventGenerator is possible, a PyoObject is too.</p>
<p>Considering the wide range of audio signal possibilities pyo is offering,
it is worthy to explore these combinations!</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="c1"># Attack - decay envelope.</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/tables.html#pyo.CosTable" title="pyo.lib.tables.CosTable"><span class="n">env</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/tables.html#pyo.CosTable" title="pyo.lib.tables.CosTable"><span class="n">CosTable</span></a><span class="p">([(</span><span class="mi">0</span><span class="p">,</span> <span class="mf">0.0</span><span class="p">),</span> <span class="p">(</span><span class="mi">64</span><span class="p">,</span> <span class="mf">1.0</span><span class="p">),</span> <span class="p">(</span><span class="mi">8191</span><span class="p">,</span> <span class="mf">0.0</span><span class="p">)])</span>
<span class="c1"># The pool of notes.</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventScale" title="pyo.lib.events.EventScale"><span class="n">scl</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventScale" title="pyo.lib.events.EventScale"><span class="n">EventScale</span></a><span class="p">(</span><span class="n">root</span><span class="o">=</span><span class="s2">"C"</span><span class="p">,</span> <span class="n">scale</span><span class="o">=</span><span class="s2">"egyptian"</span><span class="p">,</span> <span class="n">first</span><span class="o">=</span><span class="mi">4</span><span class="p">,</span> <span class="n">octaves</span><span class="o">=</span><span class="mi">3</span><span class="p">)</span>
<span class="c1"># LFO on the duration multiplier.</span>
<span class="n">durmul1</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="n">freq</span><span class="o">=</span><span class="mf">0.1</span><span class="p">)</span><span class="o">.</span><span class="n">range</span><span class="p">(</span><span class="mf">0.5</span><span class="p">,</span> <span class="mf">1.5</span><span class="p">)</span>
<span class="c1"># Random on the length of each segment.</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/randoms.html#pyo.RandInt" title="pyo.lib.randoms.RandInt"><span class="n">segment1</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/randoms.html#pyo.RandInt" title="pyo.lib.randoms.RandInt"><span class="n">RandInt</span></a><span class="p">(</span><span class="nb">max</span><span class="o">=</span><span class="mi">6</span><span class="p">,</span> <span class="n">freq</span><span class="o">=</span><span class="mf">0.5</span><span class="p">)</span>
<span class="c1"># Random on the distance between segments starting points.</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/randoms.html#pyo.RandInt" title="pyo.lib.randoms.RandInt"><span class="n">step1</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/randoms.html#pyo.RandInt" title="pyo.lib.randoms.RandInt"><span class="n">RandInt</span></a><span class="p">(</span><span class="nb">max</span><span class="o">=</span><span class="mi">6</span><span class="p">,</span> <span class="n">freq</span><span class="o">=</span><span class="mf">0.75</span><span class="p">,</span> <span class="n">add</span><span class="o">=-</span><span class="mi">3</span><span class="p">)</span>
<span class="n">e1</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.Events" title="pyo.lib.events.Events"><span class="n">Events</span></a><span class="p">(</span>
<span class="n">midinote</span><span class="o">=</span><a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventSlide" title="pyo.lib.events.EventSlide"><span class="n">EventSlide</span></a><span class="p">(</span><a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventScale" title="pyo.lib.events.EventScale"><span class="n">scl</span></a><span class="p">,</span> <a class="sphinx-codeautolink-a" href="../../api/classes/randoms.html#pyo.RandInt" title="pyo.lib.randoms.RandInt"><span class="n">segment1</span></a><span class="p">,</span> <a class="sphinx-codeautolink-a" href="../../api/classes/randoms.html#pyo.RandInt" title="pyo.lib.randoms.RandInt"><span class="n">step1</span></a><span class="p">),</span> <span class="n">beat</span><span class="o">=</span><span class="mi">1</span> <span class="o">/</span> <span class="mf">4.0</span><span class="p">,</span> <span class="n">db</span><span class="o">=</span><span class="p">[</span><span class="o">-</span><span class="mi">12</span><span class="p">,</span> <span class="o">-</span><span class="mi">18</span><span class="p">,</span> <span class="o">-</span><span class="mi">18</span><span class="p">],</span> <span class="n">envelope</span><span class="o">=</span><a class="sphinx-codeautolink-a" href="../../api/classes/tables.html#pyo.CosTable" title="pyo.lib.tables.CosTable"><span class="n">env</span></a><span class="p">,</span> <span class="n">durmul</span><span class="o">=</span><span class="n">durmul1</span><span class="p">,</span>
<span class="p">)</span><span class="o">.</span><span class="n">play</span><span class="p">()</span>
<span class="c1"># Out-of-phase LFO on the duration multiplier.</span>
<span class="n">durmul2</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="n">freq</span><span class="o">=</span><span class="mf">0.1</span><span class="p">,</span> <span class="n">phase</span><span class="o">=</span><span class="mf">0.5</span><span class="p">)</span><span class="o">.</span><span class="n">range</span><span class="p">(</span><span class="mf">0.5</span><span class="p">,</span> <span class="mf">1.5</span><span class="p">)</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/randoms.html#pyo.RandInt" title="pyo.lib.randoms.RandInt"><span class="n">segment2</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/randoms.html#pyo.RandInt" title="pyo.lib.randoms.RandInt"><span class="n">RandInt</span></a><span class="p">(</span><span class="nb">max</span><span class="o">=</span><span class="mi">6</span><span class="p">,</span> <span class="n">freq</span><span class="o">=</span><span class="mf">0.5</span><span class="p">)</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/randoms.html#pyo.RandInt" title="pyo.lib.randoms.RandInt"><span class="n">step2</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/randoms.html#pyo.RandInt" title="pyo.lib.randoms.RandInt"><span class="n">RandInt</span></a><span class="p">(</span><span class="nb">max</span><span class="o">=</span><span class="mi">6</span><span class="p">,</span> <span class="n">freq</span><span class="o">=</span><span class="mf">0.75</span><span class="p">,</span> <span class="n">add</span><span class="o">=-</span><span class="mi">3</span><span class="p">)</span>
<span class="n">e2</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.Events" title="pyo.lib.events.Events"><span class="n">Events</span></a><span class="p">(</span>
<span class="n">midinote</span><span class="o">=</span><a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventSlide" title="pyo.lib.events.EventSlide"><span class="n">EventSlide</span></a><span class="p">(</span><a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventScale" title="pyo.lib.events.EventScale"><span class="n">scl</span></a><span class="p">,</span> <a class="sphinx-codeautolink-a" href="../../api/classes/randoms.html#pyo.RandInt" title="pyo.lib.randoms.RandInt"><span class="n">segment2</span></a><span class="p">,</span> <a class="sphinx-codeautolink-a" href="../../api/classes/randoms.html#pyo.RandInt" title="pyo.lib.randoms.RandInt"><span class="n">step2</span></a><span class="p">),</span>
<span class="n">db</span><span class="o">=</span><span class="p">[</span><span class="o">-</span><span class="mi">9</span><span class="p">,</span> <span class="o">-</span><span class="mi">15</span><span class="p">,</span> <span class="o">-</span><span class="mi">15</span><span class="p">],</span>
<span class="n">envelope</span><span class="o">=</span><a class="sphinx-codeautolink-a" href="../../api/classes/tables.html#pyo.CosTable" title="pyo.lib.tables.CosTable"><span class="n">env</span></a><span class="p">,</span>
<span class="n">durmul</span><span class="o">=</span><span class="n">durmul2</span><span class="p">,</span>
<span class="n">beat</span><span class="o">=</span><span class="mi">1</span> <span class="o">/</span> <span class="mf">4.0</span><span class="p">,</span>
<span class="n">bpm</span><span class="o">=</span><span class="mi">60</span><span class="p">,</span>
<span class="n">transpo</span><span class="o">=-</span><span class="mi">12</span><span class="p">,</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>
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