Hi all,
I can’t believe I didn’t find this anywhere on the forums so posting for others. I currently have the LG C2 with the Sonos Arc and Apple TV 4K.
Here are the settings you specifically need to get Dolby Atmos to show as an option in Netflix:
LG C2
Digital audio output > Pass Through
eARC Support > On
Apple TV 4K
Video and Audio > Audio Format > Dolby Atmos On
For most people this should be all you need to do. If you notice that Dolby Atmos is showing in other apps or your TVs own OS through Netflix but not Apple TV Netflix then do this:
Find a movie you know for sure has Dolby Atmos and start the movie. (It will say 5.1 but start it anyways)
once the movie has started select different audio tracks with your Apple Remote. Eventually it should change to Dolby Atmos and when you go back all of your Netflix shows will now be labeled to Dolby Atmos if applicable. You can verify this with your Sonos app that it’s working.
Idk if this is a bug on Apple, Netflix, or Sonos but I hope this gets fixed soon.