def set_volume_level(self, volume):
        receiver_vol = 100 - (volume * 100)
        negative_receiver_vol = -receiver_vol
        self._receiver.volume = negative_receiver_vol
Set volume level, range 0..1.
dataset/ETHPy150Open home-assistant/home-assistant/homeassistant/components/media_player/yamaha.py/YamahaDevice.set_volume_level