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<div class="refentry" title="mdelay">
<a id="mdelay"></a>
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<a id="IndexMdelay" class="indexterm"></a>
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<h2>
<span class="refentrytitle">mdelay</span>
</h2>
<p>mdelay —
A MIDI delay opcode.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp30575080"></a>
<h2>Description</h2>
<p>
A MIDI delay opcode.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp30629872"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>mdelay</strong></span> kstatus, kchan, kd1, kd2, kdelay</pre>
</div>
<div class="refsect1" title="Performance">
<a id="idp30630912"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kstatus</em></span> -- status byte of MIDI message to be delayed
</p>
<p>
<span class="emphasis"><em>kchan</em></span> -- MIDI channel (1-16)
</p>
<p>
<span class="emphasis"><em>kd1</em></span> -- first MIDI data byte
</p>
<p>
<span class="emphasis"><em>kd2</em></span> -- second MIDI data byte
</p>
<p>
<span class="emphasis"><em>kdelay</em></span> -- delay time in seconds
</p>
<p>
Each time that <span class="emphasis"><em>kstatus</em></span> is other than zero, <span class="emphasis"><em>mdelay</em></span> outputs a MIDI message to the MIDI out port after <span class="emphasis"><em>kdelay</em></span> seconds. This opcode is useful in implementing MIDI delays. Several instances of <span class="emphasis"><em>mdelay</em></span> can be present in the same instrument with different argument values, so complex and colorful MIDI echoes can be implemented. Further, the delay time can be changed at k-rate.
</p>
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<div class="refsect1" title="Examples">
<a id="idp30634968"></a>
<h2>Examples</h2>
<p>
Here is an example of the mdelay opcode. It uses the file <a class="ulink" href="examples/mdelay.csd" target="_top"><em class="citetitle">mdelay.csd</em></a>.
</p>
<div class="example">
<a id="idp30635936"></a>
<p class="title">
<strong>Example 448. Example of the mdelay 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</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">;Triggered by MIDI notes on channel 1</span>
kstatus <span class="opc">init</span> 0
ifund <span class="opc">notnum</span>
ivel <span class="opc">veloc</span>
<span class="opc">noteondur</span> 1, ifund, ivel, 1
kstatus <span class="op">=</span> kstatus <span class="op">+</span> 1
idel1 <span class="op">=</span> .2
idel2 <span class="op">=</span> .4
idel3 <span class="op">=</span> .6
idel4 <span class="op">=</span> .8
<span class="comment">;make four delay lines</span>
<span class="opc">mdelay</span> kstatus,1,ifund<span class="op">+</span>2, ivel,idel1
<span class="opc">mdelay</span> kstatus,1,ifund<span class="op">+</span>4, ivel,idel2
<span class="opc">mdelay</span> kstatus,1,ifund<span class="op">+</span>6, ivel,idel3
<span class="opc">mdelay</span> kstatus,1,ifund<span class="op">+</span>8, ivel,idel4
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="comment">; Dummy ftable</span>
<span class="stamnt">f</span> 0 60
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
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<p><br class="example-break" />
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp30638208"></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>
<tr>
<td>November 1998</td>
</tr>
</table>
<p>
</p>
<p>New in Csound version 3.492</p>
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