I have a Bose Soundbar 700 with the sub and the rear speakers connected to a Sony XF9005 TV. What audio settings should I use on the ATV to ensure that I get surround sound all the time? Is it possible to force surround sound somehow? Sadly the ATV apparently only supports Dolby and not DTS and my current audio setting is Auto which is recommended. Is it better to change it to Dolby Digital 5.1 or does it not make a difference? If I chose Dolby Digital will it automatically decode everything to 5.1 sound?