/td>
          <td class="paramtype">PianoRoll *&#160;</td>
          <td class="paramname"> <em>pr</em>&#160;)</td>
          <td></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>Destroys a guido piano roll and releases all the associated ressources. </p>
<dl><dt><b>Parameters:</b></dt><dd>
  <table class="params">
    <tr><td class="paramname">pr</td><td>a pianoroll previously created with GuidoAR2PianoRoll or GuidoMidi2PianoRoll </td></tr>
  </table>
  </dd>
</dl>
<dl class="return"><dt