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<section id="ControlSubinstrument">
  <title>Sub-instrument Control</title>

  <para>
    These opcodes let one define and use a sub-instrument:
    <link linkend="ink"><citetitle>ink</citetitle></link>, 
    <link linkend="outk"><citetitle>outk</citetitle></link>, and 
    <link linkend="subinstr"><citetitle>subinstr</citetitle></link>.
  </para>

</section>
