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<refentry id="mp3len">
<indexterm id="IndexMp3len"><primary>mp3len</primary></indexterm>
<refentryinfo><title>Signal I/O:Soundfile Queries</title></refentryinfo>
<refmeta>
<refentrytitle>mp3len</refentrytitle>
</refmeta>
<refnamediv>
<refname>mp3len</refname>
<refpurpose>
Returns the length of an MP3 sound file.
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
Returns the length of an MP3 sound file.
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis>ir <command>mp3len</command> ifilcod</synopsis>
</refsect1>
<refsect1>
<title>Initialization</title>
<para>
<emphasis>ifilcod</emphasis> -- sound file to be queried
</para>
</refsect1>
<refsect1>
<title>Performance</title>
<para>
<emphasis>mp3len</emphasis> returns the length of the sound file <emphasis>ifilcod</emphasis> in seconds.
</para>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
Here is an example of the mp3len opcode. It uses the file <ulink url="examples/mp3len.csd"><citetitle>mp3len.csd</citetitle></ulink>.
<example>
<title>Example of the mp3len 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/mp3len.csd.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
</example>
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<link linkend="mp3in"><citetitle>mp3in</citetitle></link>
</para>
</refsect1>
<refsect1>
<title>Credits</title>
<para>
<simplelist>
<member>Author: &namejohn;</member>
<member>Feb 2011</member>
</simplelist>
</para>
<para>New in Csound version 5.14</para>
</refsect1>
</refentry>
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