I have the following set up:
- LG TV
- eARC aktiv
- pass through
- audio output: Dolby Atmos Plus
- Apple TV 4K (gen. 1)
- audio output: auto, Dolby Atmos on
- Sonos Beam (gen. 2)
According to Sonos App audio via Apple TV is only Multichannel 7.1 (or Dolby Digital 5.1), but not Dolby Atmos. What can I change to get Dolby Atmos via Apple TV (via TV I can see Dolby Atmos, but WebOS is awful!)