@Override
 public void setVolume(
     UnsignedIntegerFourBytes instanceId,
     String channelName,
     UnsignedIntegerTwoBytes desiredVolume)
     throws RenderingControlException {
   Log.d(getClass().getName(), "setVolume() ");
   upnpClient.setVolume(desiredVolume.getValue().intValue());
 }
 @Override
 public void setVolume(
     UnsignedIntegerFourBytes instanceId,
     String channelName,
     UnsignedIntegerTwoBytes desiredVolume)
     throws RenderingControlException {
   checkChannel(channelName);
   double vol = desiredVolume.getValue() / 100d;
   log.fine("Setting backend volume to: " + vol);
   getInstance(instanceId).setVolume(vol);
 }