def GetPos(self, channel=0):
    command = [144, channel]
    result = self._SendCommand(command, 2)
    return_val = ((result[1] << 8) | result[0])
    return return_val
def GetPos(self, channel=0):
    command = [144, channel]
    result = self._SendCommand(command, 2)
    return_val = ((result[1] << 8) | result[0])
    return return_val