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<div class="refentry" title="nrpn">
<a id="nrpn"></a>
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<a id="IndexNrpn" class="indexterm"></a>
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<h2>
<span class="refentrytitle">nrpn</span>
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<p>nrpn —
Sends a Non-Registered Parameter Number to the MIDI OUT port.
</p>
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<div class="refsect1" title="Description">
<a id="idp33081080"></a>
<h2>Description</h2>
<p>
Sends a NPRN (Non-Registered Parameter Number) message to the MIDI OUT port each time one of the input arguments changes.
</p>
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<div class="refsect1" title="Syntax">
<a id="idp33081816"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>nrpn</strong></span> kchan, kparmnum, kparmvalue</pre>
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<div class="refsect1" title="Performance">
<a id="idp33129368"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kchan</em></span> -- MIDI channel (1-16)
</p>
<p>
<span class="emphasis"><em>kparmnum</em></span> -- number of NRPN parameter
</p>
<p>
<span class="emphasis"><em>kparmvalue</em></span> -- value of NRPN parameter
</p>
<p>
This opcode sends new message when the MIDI translated value of one of the input arguments changes. It operates at k-rate. Useful with the MIDI instruments that recognize NRPNs (for example with the newest sound-cards with internal MIDI synthesizer such as SB AWE32, AWE64, GUS etc. in which each patch parameter can be changed during the performance via NRPN)
</p>
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<div class="refsect1" title="Examples">
<a id="idp33131576"></a>
<h2>Examples</h2>
<p>
Here is an example of the nrpn opcode. It uses the file <a class="ulink" href="examples/nrpn.csd" target="_top"><em class="citetitle">nrpn.csd</em></a>.
</p>
<div class="example">
<a id="idp33132544"></a>
<p class="title">
<strong>Example 515. Example of the nrpn 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>
-odac -Q1 <span class="comment">;;;realtime audio out with MIDI out</span>
<span class="comment">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</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> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1
<span class="oblock">instr</span> 1 <span class="comment">; change attack time of external synth</span>
<span class="opc">initc7</span> 1, 6, 0 <span class="comment">; set controller 6 to 0</span>
<span class="opc">nrpn</span> 1, 99, 1 <span class="comment">; set MSB</span>
<span class="opc">nrpn</span> 1, 98, 99 <span class="comment">; set LSB</span>
katt <span class="opc">ctrl7</span> 1, 6, 1, 127 <span class="comment">; DataEntMSB</span>
idur <span class="op">=</span> 2
<span class="opc">noteondur2</span> 1, 60, 100, idur <span class="comment">; play note on synth</span>
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span> 1 0 3
<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="idp33135160"></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>
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<td>1998</td>
</tr>
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<p>
</p>
<p>New in Csound version 3.492</p>
<p>Thanks goes to Rasmus Ekman for pointing out the correct MIDI channel and controller number ranges.</p>
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