Re: Roku Ultra No Surround Sound with Bose Lifestyle V20
After some research I came to the conclusion that I need a new receiver.
Roku support Dolby Digital+, while the Bose is old enough that it only supports Dolby Digital. As such, the two devices can't communicate and fallback to stereo sound.
According to this page: https://support.roku.com/article/208754498, the Roku Ultra 4640X can transcode from Dolby Digital+ to Dolby Digital and in theory would work for us. But since I don't have a 4640X, I can not verify it. In that link, see the "Note" in the section titled "More about audio formats".