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<h2>
<span class="refentrytitle">polyaft</span>
</h2>
<p>polyaft —
Returns the polyphonic after-touch pressure of the selected note number.
</p>
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<div class="refsect1" title="Description">
<a id="idp36659192"></a>
<h2>Description</h2>
<p>
<span class="emphasis"><em>polyaft</em></span> returns the polyphonic pressure of the selected note number, optionally mapped to an user-specified range.
</p>
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<div class="refsect1" title="Syntax">
<a id="idp36691952"></a>
<h2>Syntax</h2>
<pre class="synopsis">ires <span class="command"><strong>polyaft</strong></span> inote [, ilow] [, ihigh]</pre>
<pre class="synopsis">kres <span class="command"><strong>polyaft</strong></span> inote [, ilow] [, ihigh]</pre>
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<div class="refsect1" title="Initialization">
<a id="idp36693816"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>inote</em></span> -- note number. Normally set to the value returned by <a class="link" href="notnum.html" title="notnum"><em class="citetitle">notnum</em></a>
</p>
<p>
<span class="emphasis"><em>ilow</em></span> (optional, default: 0) -- lowest output value
</p>
<p>
<span class="emphasis"><em>ihigh</em></span> (optional, default: 127) -- highest output value
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp36696232"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kres</em></span> -- polyphonic pressure (aftertouch).
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp36697144"></a>
<h2>Examples</h2>
<p>
Here is an example of the polyaft opcode. It uses the file <a class="ulink" href="examples/polyaft.csd" target="_top"><em class="citetitle">polyaft.csd</em></a>.
</p>
<p>
Don't forget that you must include the <a class="link" href="CommandFlags.html#FlagsMinusUpperF"><em class="citetitle">-F flag</em></a> when using an external MIDI file like <span class="quote">“<span class="quote">polyaft.mid</span>”</span>.
</p>
<p>
</p>
<div class="example">
<a id="idp36699384"></a>
<p class="title">
<strong>Example 601. Example of the polyaft 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>
<pre class="programlisting">
<span class="csdtag"><CsoundSynthesizer></span>
<span class="csdtag"><CsOptions></span>
<span class="comment">; Select audio/midi flags here according to platform</span>
<span class="comment">; Audio out Audio in No messages MIDI in</span>
-odac -iadc -d -M0 <span class="comment">;;;RT audio I/O with MIDI in</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o polyaft.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 10
<span class="ohdr">nchnls</span> <span class="op">=</span> 1
<span class="ohdr">massign</span> 1, 1
itmp <span class="ohdr">ftgen</span> 1, 0, 1024, 10, 1 <span class="comment">; sine wave</span>
<span class="oblock">instr</span> 1
kcps <span class="opc">cpsmidib</span> 2 <span class="comment">; note frequency</span>
inote <span class="opc">notnum</span> <span class="comment">; note number</span>
kaft <span class="opc">polyaft</span> inote, 0, 127 <span class="comment">; aftertouch</span>
<span class="comment">; interpolate aftertouch to eliminate clicks</span>
ktmp <span class="opc">phasor</span> 40
ktmp <span class="opc">trigger</span> 1 <span class="op">-</span> ktmp, 0.5, 0
kaft <span class="opc">tlineto</span> kaft, 0.025, ktmp
<span class="comment">; map to sine curve for crossfade</span>
kaft <span class="op">=</span> <span class="opc">sin</span>(kaft <span class="op">*</span> 3.14159 <span class="op">/</span> 254) <span class="op">*</span> 22000
asnd <span class="opc">oscili</span> kaft, kcps, 1
<span class="opc">out</span> asnd
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">t</span> 0 120
<span class="stamnt">f</span> 0 9 2 -2 0
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
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<p><br class="example-break" />
</p>
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<div class="refsect1" title="Credits">
<a id="idp36701672"></a>
<h2>Credits</h2>
<p>Added thanks to an email from Istvan Varga</p>
<p>New in version 4.12</p>
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