Get if sound mode is supported from device.

        Method executes the method for the current receiver type.

def _get_support_sound_mode(self):
        """
        Get if sound mode is supported from device.

        Method executes the method for the current receiver type.
        """
        if self._receiver_type == AVR_X_2016.type:
            return self._get_support_sound_mode_avr_2016()
        else:
            return self._get_support_sound_mode_avr()