Dolby throughput
I'm connecting my Apple TV 4K to my sound bar via the input HDMI port on the sounder, and then the ARC port on the sounder to the ARC port on my TV. When I do this, I get Dolby Atmos, but only get 1080p Dolby Vision instead of 4K. If I connect the Apple TV directly to the TV and connect via an optical cable, I get full 4K Dolby Vision, but not Dolby Atmos.
Supposedly this sound bar (a Sony) supports both Dolby Vision and Atmos, but there's this issue with the 4K Dolby Vision. Any ideas why this is happening and is there a better way to go about this? Thanks.
iMac 21.5", macOS 10.15