I’m have been trying To get Dolby digital plus to work on my Sonos arc with no luck so far. My tv supports it and I have had it working through the native movie player on my tv and through my nvidia shield 2015 and 2017 versions. On occasion sound will play and it’s completely out of sink. But in the about my Sonos system section of the S2 app it will only show Dolby Digital 5.1 or I just wont get any sound. Im still not sure if it’s the arc which is the problem or my TV. Normal Dolby Digital streams from my PlayStation and Xbox work perfectly in Dolby Digital. But DD+ has been a disaster so far. Any advice would be appreciated.