p>Enables or not the automatic voices coloration (not enabled by default) (not for a midi rendering) // REM: à voir If a color is manually set with GuidoPianoRollSetColorToVoice, automatic color will not be applied for this voice. </p>
<dl><dt><b>Parameters:</b></dt><dd>
  <table class="params">
    <tr><td class="paramname">pr</td><td>a pianoroll previously created with GuidoAR2PianoRoll </td></tr>
    <tr><td class="paramname">enabled</td><td>a boolean corresponding to the color state </td></tr>
  </tabl