def set_volume_level(self, volume):
        volume_percent = str(int(volume*100))
        self._lms.query(self._id, 'mixer', 'volume', volume_percent)
        self.update_ha_state()
Set volume level, range 0..1.
dataset/ETHPy150Open home-assistant/home-assistant/homeassistant/components/media_player/squeezebox.py/SqueezeBoxDevice.set_volume_level