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<div class="refentry" title="noteondur">
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<h2>
<span class="refentrytitle">noteondur</span>
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<p>noteondur —
Sends a noteon and a noteoff MIDI message both with the same channel, number and velocity.
</p>
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<div class="refsect1" title="Description">
<a id="idp32985080"></a>
<h2>Description</h2>
<p>
Sends a noteon and a noteoff MIDI message both with the same channel, number and velocity.
</p>
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<div class="refsect1" title="Syntax">
<a id="idp32972128"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>noteondur</strong></span> ichn, inum, ivel, idur</pre>
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<div class="refsect1" title="Initialization">
<a id="idp32973152"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ichn</em></span> -- MIDI channel number (1-16)
</p>
<p>
<span class="emphasis"><em>inum</em></span> -- note number (0-127)
</p>
<p>
<span class="emphasis"><em>ivel</em></span> -- velocity (0-127)
</p>
<p>
<span class="emphasis"><em>idur</em></span> -- how long, in seconds, this note should last.
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp33019800"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>noteondur</em></span> (i-rate note on with duration) sends a noteon and a noteoff MIDI message both with the same channel, number and velocity. Noteoff message is sent after <span class="emphasis"><em>idur</em></span> seconds are elapsed by the time <span class="emphasis"><em>noteondur</em></span> was active.
</p>
<p>
<span class="emphasis"><em>noteondur</em></span> differs from <span class="emphasis"><em>noteondur2</em></span> in that <span class="emphasis"><em>noteondur</em></span> truncates note duration when current instrument is deactivated by score or by real-time playing, while <span class="emphasis"><em>noteondur2</em></span> will extend performance time of current instrument until <span class="emphasis"><em>idur</em></span> seconds have elapsed. In real-time playing, it is suggested to use <span class="emphasis"><em>noteondur</em></span> also for undefined durations, giving a large <span class="emphasis"><em>idur</em></span> value.
</p>
<p>
Any number of <span class="emphasis"><em>noteondur</em></span> opcodes can appear in the same Csound instrument, allowing chords to be played by a single instrument.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp33023752"></a>
<h2>Examples</h2>
<p>
Here is an example of the noteondur opcode. It uses the file <a class="ulink" href="examples/noteondur.csd" target="_top"><em class="citetitle">noteondur.csd</em></a>.
</p>
<div class="example">
<a id="idp33024744"></a>
<p class="title">
<strong>Example 511. Example of the noteondur 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>
<p>This example generates notes for every note received on the MIDI input. It generates MIDI notes on csound's MIDI output, so be sure to connect something.</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</span>
-odac -iadc -d -M0 -Q1<span class="comment">;;;RT audio I/O with MIDI in</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">kr</span> <span class="op">=</span> 4410
<span class="ohdr">ksmps</span> <span class="op">=</span> 10
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="comment">; Example by Giorgio Zucco 2007</span>
<span class="oblock">instr</span> 1 <span class="comment">;Turned on by MIDI notes on channel 1</span>
ifund <span class="opc">notnum</span>
ivel <span class="opc">veloc</span>
idur <span class="op">=</span> 1
<span class="comment">;chord with single key</span>
<span class="opc">noteondur</span> 1, ifund, ivel, idur
<span class="opc">noteondur</span> 1, ifund<span class="op">+</span>3, ivel, idur
<span class="opc">noteondur</span> 1, ifund<span class="op">+</span>7, ivel, idur
<span class="opc">noteondur</span> 1, ifund<span class="op">+</span>9, ivel, idur
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="comment">; Play Instrument #1 for 60 seconds.</span>
<span class="stamnt">i</span>1 0 60
<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="See Also">
<a id="idp33027376"></a>
<h2>See Also</h2>
<p>
<a class="link" href="noteoff.html" title="noteoff"><em class="citetitle">noteoff</em></a>,
<a class="link" href="noteon.html" title="noteon"><em class="citetitle">noteon</em></a>,
<a class="link" href="noteondur2.html" title="noteondur2"><em class="citetitle">noteondur2</em></a>,
<a class="link" href="midion.html" title="midion"><em class="citetitle">midion</em></a>,
<a class="link" href="midion2.html" title="midion2"><em class="citetitle">midion2</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp33030312"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Gabriel Maldonado</td>
</tr>
<tr>
<td>Italy</td>
</tr>
</table>
<p>
</p>
<p>New in Csound version 3.47</p>
<p>Thanks goes to Rasmus Ekman for pointing out the correct MIDI channel and controller number ranges.</p>
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