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<refentry id="platerev">
<indexterm id="IndexPlaterev"><primary>platerev</primary></indexterm>
<refentryinfo><title>Signal Modifiers:Reverberation</title></refentryinfo>
<refmeta>
<refentrytitle>platerev</refentrytitle>
</refmeta>
<refnamediv>
<refname>platerev</refname>
<refpurpose>
Models the reverberation of a metal plate.
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
Models the reverberation of a rectangular metal plate with
settable physical characteristics when excited by audio signal(s).
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis>a1[, a2, ...] <command>platerev</command> itabexcite. itabouts, kbndry, iaspect, istiff, idecay, iloss, aexcite1[, aexcite2, ...]</synopsis>
</refsect1>
<refsect1>
<title>Initialization</title>
<para>
<emphasis>itabexcite</emphasis> -- 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.
</para>
<para>
<emphasis>itabouts</emphasis> -- number of a table that
contains triplets for each output signal, (frequency, radius,
initial phase in radians). See itabexcite description.
</para>
<para>
<emphasis>kbndry</emphasis> -- 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.
</para>
<para>
<emphasis>iaspect</emphasis> -- plate aspect ratio which should
be less than or equal to 1.
</para>
<para>
<emphasis>istiff</emphasis> -- plate stiffness parameter (set
around 1 or less for plate reverb).
</para>
<para>
<emphasis>idecay</emphasis> -- time taken for 30 dB decay
</para>
<para>
<emphasis>iloss</emphasis> -- loss parameter for
high-frequency damping (value about 0.001 suggested).
</para>
</refsect1>
<refsect1>
<title>Performance</title>
<para>
A metal plate is excited by a stereo signal and the resulting
reverberation captured.
</para>
<para>
<emphasis>aexcite</emphasis>n -- excitation signal to be
inserted into the plate.
</para>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
Here is an example of the platerev opcode. It uses the file <ulink url="examples/plate.csd"><citetitle>plate.csd</citetitle></ulink>.
<example>
<title>Example of the platerev opcode.</title>
<para>See the sections <link linkend="UsingRealTime"><citetitle>Real-time Audio</citetitle></link> and <link linkend="CommandFlags"><citetitle>Command Line Flags</citetitle></link> for more information on using command line flags.</para>
<xi:include href="examples-xml/plate.csd.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
</example>
</para>
</refsect1>
<refsect1>
<title>Credits</title>
<para>
<simplelist>
<member>Author: Stefan Bilbao </member>
<member>University of Edinburgh, UK</member>
<member>Author: &namejohn; </member>
<member>University of Bath, Codemist Ltd.</member>
<member>Bath, UK</member>
</simplelist>
</para>
<para>New in Csound version 5.17.12</para>
</refsect1>
</refentry>
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