I've got a new soundbar for Christmas (Yamaha YAS207) which I've connected to my Bluray player via HDMI and then to my TV using ARC. Problem is, I only seem to be able to get a Dolby 5.1 or DTS signal through my Bluray player. I've tried connecting my Sky box with an optical cable but the soundbar always seems to default to the audio return channel. I also stream files from a NAS box to my TV but the TV seems to downmix the audio to a stereo signal. Is this an issue with the TV (Panasonic 48AS640) or the soundbar or something else entirely?