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<div class="refentry" title="platerev">
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<h2>
<span class="refentrytitle">platerev</span>
</h2>
<p>platerev —
Models the reverberation of a metal plate.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp36450224"></a>
<h2>Description</h2>
<p>
Models the reverberation of a rectangular metal plate with
settable physical characteristics when excited by audio signal(s).
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp36450968"></a>
<h2>Syntax</h2>
<pre class="synopsis">a1[, a2, ...] <span class="command"><strong>platerev</strong></span> itabexcite. itabouts, kbndry, iaspect, istiff, idecay, iloss, aexcite1[, aexcite2, ...]</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp36461544"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>itabexcite</em></span> -- number of a table that
contains triplets for each excitation signal, (frequency, radius,
initial phase in radians). The radius should be less than 1.
These control where the excitation happens. The values in the
table for frequency and radius may be changed in performance,
with the proviso about clicking if the changes are too large.
</p>
<p>
<span class="emphasis"><em>itabouts</em></span> -- number of a table that
contains triplets for each output signal, (frequency, radius,
initial phase in radians). See itabexcite description.
</p>
<p>
<span class="emphasis"><em>kbndry</em></span> -- boundary condition of the plate;
0 = free, 1 = clamped, 2 = pivoting. Other values are
undefined. Thus parameter may be changed at k-rate but that
might give rise to clicks.
</p>
<p>
<span class="emphasis"><em>iaspect</em></span> -- plate aspect ratio which should
be less than or equal to 1.
</p>
<p>
<span class="emphasis"><em>istiff</em></span> -- plate stiffness parameter (set
around 1 or less for plate reverb).
</p>
<p>
<span class="emphasis"><em>idecay</em></span> -- time taken for 30 dB decay
</p>
<p>
<span class="emphasis"><em>iloss</em></span> -- loss parameter for
high-frequency damping (value about 0.001 suggested).
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp36502256"></a>
<h2>Performance</h2>
<p>
A metal plate is excited by a stereo signal and the resulting
reverberation captured.
</p>
<p>
<span class="emphasis"><em>aexcite</em></span>n -- excitation signal to be
inserted into the plate.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp36503432"></a>
<h2>Examples</h2>
<p>
Here is an example of the platerev opcode. It uses the file <a class="ulink" href="examples/plate.csd" target="_top"><em class="citetitle">plate.csd</em></a>.
</p>
<div class="example">
<a id="idp36504400"></a>
<p class="title">
<strong>Example 596. Example of the platerev 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">;-odac ;;;realtime audio out</span>
<span class="comment">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
-o plate.wav -W <span class="comment">;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="comment">; Note: this example is heavy on CPU</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
ab <span class="opc">diskin2</span> "beats.wav", 1
al,ar <span class="opc">platerev</span> 1, 2, p4, 0.73, 1.0, 5.0, 0.001, ab,ab
<span class="opc">outs</span> al<span class="op">*</span>.25,ar<span class="op">*</span>.25
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">f</span>1 0 8 -2 0.3 0.3875 0.39274 0.32 0.85714 0.78548
<span class="stamnt">f</span>2 0 8 -2 0.2 0.666667 1.57097 0.24 0.75 0.78548
<span class="stamnt">i</span>1 0 4 1
<span class="stamnt">i</span>1 + 4 2
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
</p>
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<div class="refsect1" title="Credits">
<a id="idp36506672"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Stefan Bilbao </td>
</tr>
<tr>
<td>University of Edinburgh, UK</td>
</tr>
<tr>
<td>Author: John ffitch </td>
</tr>
<tr>
<td>University of Bath, Codemist Ltd.</td>
</tr>
<tr>
<td>Bath, UK</td>
</tr>
</table>
<p>
</p>
<p>New in Csound version 5.17.12</p>
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