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<section id="embedding-generators-py-from-words-to-musical-phrases">
<h1>09-embedding-generators.py - From words to musical phrases.<a class="headerlink" href="#embedding-generators-py-from-words-to-musical-phrases" title="Permalink to this heading">¶</a></h1>
<p>If we consider that an EventGenerator is producing a word, then a sequence of
EventGenerator can be used to build a sentence or a phrase. When a generators
encounters another generator as its value, the inner generator is embedded
into the output stream. That is, the inner generator takes over until it runs
out of values to return. Then, the control returns to the outer generator.
There is no limit to the number of levels of embedding.</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"># Random walk over 3-note melody segments.</span>
<span class="n">e</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">degree</span><span class="o">=</span><a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventDrunk" title="pyo.lib.events.EventDrunk"><span class="n">EventDrunk</span></a><span class="p">(</span>
<span class="p">[</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventSeq" title="pyo.lib.events.EventSeq"><span class="n">EventSeq</span></a><span class="p">([</span><span class="mf">5.00</span><span class="p">,</span> <span class="mf">5.02</span><span class="p">,</span> <span class="mf">5.03</span><span class="p">],</span> <span class="mi">1</span><span class="p">),</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventSeq" title="pyo.lib.events.EventSeq"><span class="n">EventSeq</span></a><span class="p">([</span><span class="mf">5.07</span><span class="p">,</span> <span class="mf">5.05</span><span class="p">,</span> <span class="mf">5.03</span><span class="p">],</span> <span class="mi">1</span><span class="p">),</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventSeq" title="pyo.lib.events.EventSeq"><span class="n">EventSeq</span></a><span class="p">([</span><span class="mf">5.07</span><span class="p">,</span> <span class="mf">5.08</span><span class="p">,</span> <span class="mf">5.11</span><span class="p">],</span> <span class="mi">1</span><span class="p">),</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventSeq" title="pyo.lib.events.EventSeq"><span class="n">EventSeq</span></a><span class="p">([</span><span class="mf">6.00</span><span class="p">,</span> <span class="mf">6.07</span><span class="p">,</span> <span class="mf">6.03</span><span class="p">],</span> <span class="mi">1</span><span class="p">),</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventSeq" title="pyo.lib.events.EventSeq"><span class="n">EventSeq</span></a><span class="p">([</span><span class="mf">6.07</span><span class="p">,</span> <span class="mf">6.05</span><span class="p">,</span> <span class="mf">6.07</span><span class="p">],</span> <span class="mi">1</span><span class="p">),</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventSeq" title="pyo.lib.events.EventSeq"><span class="n">EventSeq</span></a><span class="p">([</span><span class="mf">6.07</span><span class="p">,</span> <span class="mf">6.08</span><span class="p">,</span> <span class="mf">6.11</span><span class="p">],</span> <span class="mi">1</span><span class="p">),</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventSeq" title="pyo.lib.events.EventSeq"><span class="n">EventSeq</span></a><span class="p">([</span><span class="mf">7.00</span><span class="p">,</span> <span class="mf">7.03</span><span class="p">,</span> <span class="mf">7.02</span><span class="p">],</span> <span class="mi">1</span><span class="p">),</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventSeq" title="pyo.lib.events.EventSeq"><span class="n">EventSeq</span></a><span class="p">([</span><span class="mf">7.05</span><span class="p">,</span> <span class="mf">7.08</span><span class="p">,</span> <span class="mf">7.07</span><span class="p">],</span> <span class="mi">1</span><span class="p">),</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventSeq" title="pyo.lib.events.EventSeq"><span class="n">EventSeq</span></a><span class="p">([</span><span class="mf">7.08</span><span class="p">,</span> <span class="mf">7.11</span><span class="p">,</span> <span class="mf">8.00</span><span class="p">],</span> <span class="mi">1</span><span class="p">),</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventSeq" title="pyo.lib.events.EventSeq"><span class="n">EventSeq</span></a><span class="p">([</span><span class="mf">8.00</span><span class="p">,</span> <span class="mf">7.07</span><span class="p">,</span> <span class="mf">7.03</span><span class="p">],</span> <span class="mi">1</span><span class="p">),</span>
<span class="p">],</span>
<span class="n">maxStep</span><span class="o">=</span><a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventSeq" title="pyo.lib.events.EventSeq"><span class="n">EventSeq</span></a><span class="p">([</span><span class="mi">2</span><span class="p">]</span> <span class="o">*</span> <span class="mi">8</span> <span class="o">+</span> <span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">*</span> <span class="mi">4</span><span class="p">),</span>
<span class="n">occurrences</span><span class="o">=</span><span class="n">inf</span><span class="p">,</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">3.0</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">6</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">12</span><span class="p">],</span>
<span class="n">attack</span><span class="o">=</span><span class="mf">0.001</span><span class="p">,</span>
<span class="n">decay</span><span class="o">=</span><span class="mf">0.05</span><span class="p">,</span>
<span class="n">sustain</span><span class="o">=</span><span class="mf">0.5</span><span class="p">,</span>
<span class="n">release</span><span class="o">=</span><span class="mf">0.005</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"># Chord progression: I - II - I - V.</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">degree</span><span class="o">=</span><a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventSeq" title="pyo.lib.events.EventSeq"><span class="n">EventSeq</span></a><span class="p">(</span>
<span class="p">[</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventSeq" title="pyo.lib.events.EventSeq"><span class="n">EventSeq</span></a><span class="p">([</span><span class="mf">4.00</span><span class="p">,</span> <span class="mf">4.03</span><span class="p">,</span> <span class="mf">4.07</span><span class="p">],</span> <span class="mi">2</span><span class="p">),</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventSeq" title="pyo.lib.events.EventSeq"><span class="n">EventSeq</span></a><span class="p">([</span><span class="mf">4.02</span><span class="p">,</span> <span class="mf">4.05</span><span class="p">,</span> <span class="mf">4.08</span><span class="p">],</span> <span class="mi">2</span><span class="p">),</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventSeq" title="pyo.lib.events.EventSeq"><span class="n">EventSeq</span></a><span class="p">([</span><span class="mf">4.00</span><span class="p">,</span> <span class="mf">4.03</span><span class="p">,</span> <span class="mf">4.07</span><span class="p">],</span> <span class="mi">2</span><span class="p">),</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/events.html#pyo.EventSeq" title="pyo.lib.events.EventSeq"><span class="n">EventSeq</span></a><span class="p">([</span><span class="mf">3.11</span><span class="p">,</span> <span class="mf">4.02</span><span class="p">,</span> <span class="mf">4.07</span><span class="p">],</span> <span class="mi">2</span><span class="p">),</span>
<span class="p">],</span>
<span class="n">occurrences</span><span class="o">=</span><span class="n">inf</span><span class="p">,</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">3.0</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">6</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">12</span><span class="p">],</span>
<span class="n">attack</span><span class="o">=</span><span class="mf">0.001</span><span class="p">,</span>
<span class="n">decay</span><span class="o">=</span><span class="mf">0.05</span><span class="p">,</span>
<span class="n">sustain</span><span class="o">=</span><span class="mf">0.5</span><span class="p">,</span>
<span class="n">release</span><span class="o">=</span><span class="mf">0.005</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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