Is there anyway I can use the Siri Remote to adjust the volume of my Vizio soundbar instead of the TV speakers on my Vizio TV? I only use my TV when I'm using my Apple TV and the ability with the Sleep Now and being able to use the Siri Remote to power on my TV and Apple TV at the same time is great, but I would love to be able to control volume on the sound bar as well. It would eliminate the need to use my Harmony remote.