custom_components/vizio/media_player.py
def volume_down(self):
        """Decreasing volume of the device."""
        self._volume_level -= self._volume_step / self._max_volume
        self._device.vol_down(num=self._volume_step)
def volume_down(self):
        """Decreasing volume of the device."""
        self._volume_level -= self._volume_step / self._max_volume
        self._device.vol_down(num=self._volume_step)
Decreasing volume of the device.