I was hoping to get some consistent test cases to decide what further investment to make in ATMOS capability (speakers).
My Aquaman BluRay plays ATMOS in my BluRay player. Was hoping to create MKV file do I could try in Plex. I got a 7.1 THD track, but playing in plex on both LG's plex app and firestick4K Plex app didn't do anything but Dolby Surround. I have not yet tried using PC w/ Plex server and player on it directing to AVR.
I'm not as crazy about getting Volby Vision right now. So is there something I need to do differently? Is there post processing needed on the MKV file from MakeMKV. Do I have a PLEX issue?

Anyone help an old guy struggling with this ??? THX in advance