I just bought a new Sonos Arc and LG 65OLED65AUA tv. Everything seems OK but I am having problems with sound from my Apple TV 4K (latest version). I only get sound when Dolby Atmos content is played, no sound with Dolby 5.1, HD, etc. I spent and hour with Sonos phone support yesterday. We were unable to find a solution. I tried different settings on the Apple TV and LG tv. Today I turned off the eARC setting on the LG tv and now all is working. I think with eARC there is more information transferred with ARC and there might be a slight difference in sound with Dolby Atmos. The eARC was turned on automatically when I installed the Sonos Arc on the LG tv. Just curious why the eARC setting seems to fix the problem. Thanks.
Best answer by GuitarSuperstarView original