Have an Apple TV 4K (current gen Ethernet model) connected to a Samsung QN90B which is in turn connected to home theatre AV via HDMI ARC. When I enable Atmos via the TV menu, there is a lag in the sound of ~1 second which is unbearable. I thought it was the AV at first but even if I direct the sound out of the TV speakers the same lag persists. If I use the TV’s built-in apps there is no lag. If I disable Atmos there is no lag. Anyone know how to get rid of this lag so that I can enjoy Atmos via the Apple TV?
I had the same problem but I figured out I had to change the setting on my TV and it worked spot on ever since.
Which setting did you change?
Are you connected by ARC or eARC?
You can try adjusting the Digital Output Delay settings.
https://www.rtings.com/tv/reviews/samsung/qn90b-qled/settings#arc/earc
The amp can do eARC, but when I enable it there is no sound from any of the TVs built-in apps. It’s really frustrating.