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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">
<a id="idm281472902870344"></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>
</div>
<div class="refsect1">
<a id="idm281472902868472"></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>
</div>
<div class="refsect1">
<a id="idm281472902864808"></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">
<a id="idm281472902860280"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kres</em></span> -- polyphonic pressure (aftertouch).
</p>
</div>
<div class="refsect1">
<a id="idm281472902858552"></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="idm281472902854456"></a>
<p class="title">
<strong>Example 704. 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>
<div class="refsect1">
<a id="idm281472723972824"></a>
<pre class="programlisting">
<span class="nt"><CsoundSynthesizer></span>
<span class="nt"><CsOptions></span>
<span class="c1">; Select audio/midi flags here according to platform</span>
<span class="c1">; Audio out Audio in No messages MIDI in</span>
-odac -iadc -d -M0 <span class="c1">;;;RT audio I/O with MIDI in</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o polyaft.wav -W ;;; for file output any platform</span>
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">10</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">1</span>
<span class="nb">massign</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span>
i<span class="n">tmp</span> <span class="nb">ftgen</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1024</span><span class="p">,</span> <span class="mi">10</span><span class="p">,</span> <span class="mi">1</span> <span class="c1">; sine wave</span>
<span class="kd">instr</span> <span class="nf">1</span>
k<span class="n">cps</span> <span class="nb">cpsmidib</span> <span class="mi">2</span> <span class="c1">; note frequency</span>
i<span class="n">note</span> <span class="nb">notnum</span> <span class="c1">; note number</span>
k<span class="n">aft</span> <span class="nb">polyaft</span> i<span class="n">note</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">127</span> <span class="c1">; aftertouch</span>
<span class="c1">; interpolate aftertouch to eliminate clicks</span>
k<span class="n">tmp</span> <span class="nb">phasor</span> <span class="mi">40</span>
k<span class="n">tmp</span> <span class="nb">trigger</span> <span class="mi">1</span> <span class="o">-</span> k<span class="n">tmp</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">,</span> <span class="mi">0</span>
k<span class="n">aft</span> <span class="nb">tlineto</span> k<span class="n">aft</span><span class="p">,</span> <span class="mf">0.025</span><span class="p">,</span> k<span class="n">tmp</span>
<span class="c1">; map to sine curve for crossfade</span>
k<span class="n">aft</span> <span class="o">=</span> <span class="nb">sin</span><span class="p">(</span>k<span class="n">aft</span> <span class="o">*</span> <span class="mf">3.14159</span> <span class="o">/</span> <span class="mi">254</span><span class="p">)</span> <span class="o">*</span> <span class="mi">22000</span>
a<span class="n">snd</span> <span class="nb">oscili</span> k<span class="n">aft</span><span class="p">,</span> k<span class="n">cps</span><span class="p">,</span> <span class="mi">1</span>
<span class="nb">out</span> a<span class="n">snd</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">t</span> <span class="mi">0</span> <span class="mi">120</span>
<span class="nb">f</span> <span class="mi">0</span> <span class="mi">9</span> <span class="mi">2</span> <span class="o">-</span><span class="mi">2</span> <span class="mi">0</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
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<p><br class="example-break" />
</p>
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<div class="refsect1">
<a id="idm281472902850232"></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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