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<section id="SigmodEnvelope">
  <title>Envelope Modifiers</title>

  <para>
    The opcodes that modify envelopes are
    <link linkend="envlpx"><citetitle>envlpx</citetitle></link>,
    <link linkend="envlpxr"><citetitle>envlpxr</citetitle></link>,
    <link linkend="linen"><citetitle>linen</citetitle></link>, and
    <link linkend="linenr"><citetitle>linenr</citetitle></link>.
  </para>

</section>
