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<section id="SigioQueries">
  <title>Sound File Queries</title>

  <para>
    The opcodes that query information about files are
    <link linkend="filelen"><citetitle>filelen</citetitle></link>,
    <link linkend="filenchnls"><citetitle>filenchnls</citetitle></link>,
    <link linkend="filepeak"><citetitle>filepeak</citetitle></link>, and
    <link linkend="filesr"><citetitle>filesr</citetitle></link>.
  </para>

</section>
