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<h2>
<span class="refentrytitle">notnum</span>
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<p>notnum —
Get a note number from a MIDI event.
</p>
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<div class="refsect1">
<a id="idm281472910678920"></a>
<h2>Description</h2>
<p>
Get a note number from a MIDI event.
</p>
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<div class="refsect1">
<a id="idm281472910677592"></a>
<h2>Syntax</h2>
<pre class="synopsis">ival <span class="command"><strong>notnum</strong></span></pre>
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<div class="refsect1">
<a id="idm281472910635512"></a>
<h2>Performance</h2>
<p>
Get the MIDI byte value (0 - 127) denoting the note number of the current event.
</p>
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<div class="refsect1">
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<h2>Examples</h2>
<p>
Here is an example of the notnum opcode. It uses the file <a class="ulink" href="examples/notnum.csd" target="_top"><em class="citetitle">notnum.csd</em></a>.
</p>
<div class="example">
<a id="idm281472910632312"></a>
<p class="title">
<strong>Example 603. Example of the notnum 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="idm281472734053512"></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>
-odac -M0 -+rtmidi=virtual <span class="c1">;;;realtime audio out with virtual MIDI in</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">32</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">2</span>
<span class="vg">0dbfs</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> <span class="c1">; set MIDI channel 1 to play instr 1</span>
<span class="kd">instr</span> <span class="nf">1</span>
i<span class="n">Num</span> <span class="nb">notnum</span>
<span class="nb">print</span> i<span class="n">Num</span>
<span class="c1">; Convert MIDI note number to Hz</span>
i<span class="n">Hz</span> <span class="o">=</span> <span class="p">(</span><span class="mf">440.0</span><span class="o">*</span><span class="nb">exp</span><span class="p">(</span><span class="nb">log</span><span class="p">(</span><span class="mf">2.0</span><span class="p">)</span><span class="o">*</span><span class="p">((</span>i<span class="n">Num</span><span class="p">)</span><span class="o">-</span><span class="mf">69.0</span><span class="p">)</span><span class="o">/</span><span class="mf">12.0</span><span class="p">))</span>
a<span class="n">osc</span> <span class="nb">oscil</span> <span class="mf">0.6</span><span class="p">,</span> i<span class="n">Hz</span><span class="p">,</span> <span class="mi">1</span>
<span class="nb">outs</span> a<span class="n">osc</span><span class="p">,</span> a<span class="n">osc</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">f</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">16384</span> <span class="mi">10</span> <span class="mi">1</span> <span class="c1">;sine wave</span>
<span class="nb">f</span> <span class="mi">0</span> <span class="mi">60</span> <span class="c1">;play 60 seconds</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="idm281472910628120"></a>
<h2>See Also</h2>
<p>
<a class="link" href="aftouch.html" title="aftouch"><em class="citetitle">aftouch</em></a>,
<a class="link" href="ampmidi.html" title="ampmidi"><em class="citetitle">ampmidi</em></a>,
<a class="link" href="cpsmidi.html" title="cpsmidi"><em class="citetitle">cpsmidi</em></a>,
<a class="link" href="cpsmidib.html" title="cpsmidib"><em class="citetitle">cpsmidib</em></a>,
<a class="link" href="midictrl.html" title="midictrl"><em class="citetitle">midictrl</em></a>,
<a class="link" href="octmidi.html" title="octmidi"><em class="citetitle">octmidi</em></a>,
<a class="link" href="octmidib.html" title="octmidib"><em class="citetitle">octmidib</em></a>,
<a class="link" href="pchbend.html" title="pchbend"><em class="citetitle">pchbend</em></a>,
<a class="link" href="pchmidi.html" title="pchmidi"><em class="citetitle">pchmidi</em></a>,
<a class="link" href="pchmidib.html" title="pchmidib"><em class="citetitle">pchmidib</em></a>,
<a class="link" href="veloc.html" title="veloc"><em class="citetitle">veloc</em></a>
</p>
</div>
<div class="refsect1">
<a id="idm281472910616408"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Barry L. Vercoe - Mike Berry</td>
</tr>
<tr>
<td>MIT - Mills</td>
</tr>
<tr>
<td>May 1997</td>
</tr>
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<p>
</p>
<p>Example written by David Akbari.</p>
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