</td><td>the width of the piano roll (-1 to set the default width : 1024) </td></tr>
    <tr><td class="paramname">height</td><td>the height of the canvas (-1 to set the default height : 512) </td></tr>
  </table>
  </dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>a Guido error code (returns guidoErrBadParameter if keyboard width is higher than width param) </dd></dl>

</div>
</div>
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