Dolby Atmos not detecting compatible reciever over eARC (Via TV)

After a lot of test, to solve it i plug xbox on my lg cx with option sync AV arc bypass and activate earc with my denon 1600h.

If earc is off there is a big audio delay but my denon receive an atmos emulated (pcm) for all game, If earc on no delay atmos OK on halo, forza etc... But no atmos on ubisoft game same as farcry 6.

Ubisoft game not really atmos but a dolby 7.1 sound ?

My conclusion If xbox use dolby atmos emulation or no earc there is a delay, if earc activate no delay but only atmos with game compatible

Thanks for the response. That’s along the lines of what I was thinking (the xbox not needing to support eARC). This would mean the current issue I am experiencing is caused by my TV not properly passing through the audio of the Xbox.

From what I’ve seen, the higher bandwidth of eARC is required to pass through full, uncompressed Dolby Atmos with no A/V sync issues. I am currently having an issue where the audio from the Xbox is lagging behind the video whenever I play a game with Dolby
Atmos enabled. Ex: I fire a shot in Call of Duty and the sound has a delay. Just wondering if its my TV having a software issue or if its the Xbox.

My current console setup is:

Xbox plugged directly into my TV (2019 LG C9 OLED, which supports eARC and Dolby Atmos). All of the ports on the TV support HDMI 2.1 features (eARC, ALLM, VRR/FreeSync, etc...)

I have my sound bar (Sony Z9F, which also supports eARC and Dolby Atmos) plugged directly into the TV.

The Xbox and sound bar are both connected to the TV via Ultra High Speed HDMI cables that support eARC.

Thank you for replying.

LG 65 inch OLED C9.

Soundbar Samsung HW 950. Both support Dolby Atmos.

Currently, the console is plugged into the TV via HDMI. Then the soundbar receives the sound via eARC.

Apple TV is configured the same way. Dolby Atmos works fine.

TV configured at 60 HZ, 30 bits per pixel.

I am not part of the Insiders Program, would it be worth enrolling?

4K HDMI cable, the same type of cable to Apple TV. Dolby Atmos works just fine.

Cheers.

Thank you for replying.

LG 65 inch OLED C9.

Soundbar Samsung HW 950. Both support Dolby Atmos.

Currently, the console is plugged into the TV via HDMI. Then the soundbar receives the sound via eARC.

Apple TV is configured the same way. Dolby Atmos works fine.

TV configured at 60 HZ, 30 bits per pixel.

I am not part of the Insiders Program, would it be worth enrolling?

Cheers.

Thank you for replying.

LG 65 inch OLED C9.

Soundbar Samsung HW 950. Both support Dolby Atmos.

Currently, the console is plugged into the TV via HDMI. Then the soundbar receives the sound via eARC.

Apple TV is configured the same way. Dolby Atmos works fine.

TV configured at 60 HZ, 30 bits per pixel.

I am not part of the Insiders Program, would it be worth enrolling?

Cheers.