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<h2>
<span class="refentrytitle">select</span>
</h2>
<p>select —
Select sample value based on audio-rate comparisons.
</p>
</div>
<div class="refsect1">
<a id="idm281472892475480"></a>
<h2>Description</h2>
<p>
Select sample value from three based on audio-rate comparisons of
two signals.
</p>
</div>
<div class="refsect1">
<a id="idm281472892474216"></a>
<h2>Syntax</h2>
<pre class="synopsis">aout <span class="command"><strong>select</strong></span> a1, a2, aless, aequal, amore</pre>
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<div class="refsect1">
<a id="idm281472892469400"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>a1, a2</em></span> -- audio signals that are compared.
</p>
<p>
<span class="emphasis"><em>aless</em></span> -- audio signal selected if a1[n]<a2[n]
</p>
<p>
<span class="emphasis"><em>aequal</em></span> -- audio signal selected if a1[n]=a2[n]
</p>
<p>
<span class="emphasis"><em>asig</em></span> -- audio signal selected if a1[n]>a2[n]
</p>
<p>
The comparison is made sample by sample.
</p>
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<div class="refsect1">
<a id="idm281472892464248"></a>
<h2>Examples</h2>
<p>
Here is an example of the select opcode. It uses the file <a class="ulink" href="examples/select.csd" target="_top"><em class="citetitle">select.csd</em></a>.
</p>
<div class="example">
<a id="idm281472892462472"></a>
<p class="title">
<strong>Example 866. Example of the select opcode.</strong>
</p>
<div class="example-contents">
<p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
<div class="refsect1">
<a id="idm281472712960792"></a>
<pre class="programlisting">
<span class="nt"><CsoundSynthesizer></span>
<span class="nt"><CsInstruments></span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">3</span>
<span class="vg">0dbfs</span> <span class="o">=</span> <span class="mi">1</span>
<span class="kd">instr</span> <span class="nf">1</span>
a<span class="n">1</span> <span class="nb">oscil</span> <span class="mf">0.8</span><span class="p">,</span> <span class="mi">440</span>
a<span class="n">2</span> <span class="nb">oscil</span> <span class="mf">0.6</span><span class="p">,</span> <span class="mi">880</span>
a<span class="n">z</span> <span class="o">=</span> <span class="mi">0</span>
a<span class="n">low</span> <span class="nb">line</span> <span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span>
a<span class="n">high</span> <span class="nb">line</span> <span class="mi">1</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="mi">1</span>
a<span class="n">out</span> <span class="n">select</span> a<span class="n">1</span><span class="p">,</span>a<span class="n">2</span><span class="p">,</span>a<span class="n">low</span><span class="p">,</span>a<span class="n">z</span><span class="p">,</span>a<span class="n">high</span>
<span class="nb">outch</span> <span class="mi">1</span><span class="p">,</span> a<span class="n">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span>a<span class="n">2</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span>a<span class="n">out</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">i</span><span class="mi">1</span> <span class="mi">0</span> <span class="mi">5</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
</div>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1">
<a id="idm281472892458328"></a>
<h2>See Also</h2>
<p>
<a class="link" href="deltap.html" title="deltap"><em class="citetitle">deltap</em></a>
</p>
</div>
<div class="refsect1">
<a id="idm281472892455864"></a>
<h2>Credits</h2>
<p>By: John ffitch 2016</p>
<p>New in vesion 6.09</p>
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