   </table>
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<p>Sets limits to a piano roll (start/end date, lower/higher pitch) </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>
    <tr><td class="paramname">limitParams</td><td>the structure containing limits : start date (<a class="el" href="structGuidoDate.html">GuidoDate</a>) (0/0 to adjust automatically start date to the score's 