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<div class="refentry" title="mpulse">
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<h2>
<span class="refentrytitle">mpulse</span>
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<p>mpulse —
Generates a set of impulses.
</p>
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<div class="refsect1" title="Description">
<a id="idp32375368"></a>
<h2>Description</h2>
<p>
Generates a set of impulses of amplitude <span class="emphasis"><em>kamp</em></span> separated by <span class="emphasis"><em>kintvl</em></span> seconds (or samples if <span class="emphasis"><em>kintvl</em></span> is negative). The first impulse is generated after a delay of <span class="emphasis"><em>ioffset</em></span> seconds.
</p>
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<div class="refsect1" title="Syntax">
<a id="idp32416824"></a>
<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>mpulse</strong></span> kamp, kintvl [, ioffset]</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp32417968"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ioffset</em></span> (optional, default=0) -- the delay before the first impulse. If it is negative, the value is taken as the number of samples, otherwise it is in seconds. Default is zero.
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp32419152"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kamp</em></span> -- amplitude of the impulses generated
</p>
<p>
<span class="emphasis"><em>kintvl</em></span> -- Interval of time in seconds (or samples if <span class="emphasis"><em>kintvl</em></span> is negative) to the next pulse.
</p>
<p>
After the initial delay, an impulse of <span class="emphasis"><em>kamp</em></span> amplitude is generated as a single sample. Immediately after generating the impulse, the time of the next one is determined from the value of <span class="emphasis"><em>kintvl</em></span> at that precise moment. This means that any changes in <span class="emphasis"><em>kintvl</em></span> between impulses are discarded. If <span class="emphasis"><em>kintvl</em></span> is zero, there is an infinite wait to the next impulse. If <span class="emphasis"><em>kintvl</em></span> is negative, the interval is counted in number of samples rather than seconds.
</p>
<p>
</p>
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<div class="refsect1" title="Examples">
<a id="idp32422832"></a>
<h2>Examples</h2>
<p>
Here is an example of the mpulse opcode. It uses the file <a class="ulink" href="examples/mpulse.csd" target="_top"><em class="citetitle">mpulse.csd</em></a>.
</p>
<div class="example">
<a id="idp32423808"></a>
<p class="title">
<strong>Example 497. Example of the mpulse 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 <span class="comment">;;;RT audio I/O</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o mpulse.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="comment">; Initialize the global variables.</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> 1
gkfreq <span class="opc">init</span> 0.1
<span class="oblock">instr</span> 1
kamp <span class="op">=</span> 10000
a1 <span class="opc">mpulse</span> kamp, gkfreq
<span class="opc">out</span> a1
<span class="oblock">endin</span>
<span class="oblock">instr</span> 2
<span class="comment">; Assign the value of p4 to gkfreq</span>
gkfreq <span class="opc">init</span> p4
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="comment">; Play Instrument #1 for one second.</span>
<span class="stamnt">i</span> 1 0 11
<span class="stamnt">i</span> 2 2 1 0.05
<span class="stamnt">i</span> 2 4 1 0.01
<span class="stamnt">i</span> 2 6 1 0.005
<span class="comment">; only last notes are audible</span>
<span class="stamnt">i</span> 2 8 1 0.003
<span class="stamnt">i</span> 2 10 1 0.002
<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="See Also">
<a id="idp32426080"></a>
<h2>See Also</h2>
<p>
Another example of how to use mpulse can be found here: <a class="link" href="mode.html" title="mode"><em class="citetitle">mode</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp32427232"></a>
<h2>Credits</h2>
<p>Written by John ffitch.</p>
<p>New in version 4.08</p>
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