Does XBox One X require my soundbar to support eARC for Dolby Atmos?

Thanks for your reply, but that has obviously not resolved the issue.

I've done a few tests regarding the apps.

When the CX has eARC on and Digital Sound out set to passthrough and Allow Passthrough setting is ticked on the XSX, the sound bar is not recognised as an atmos capable device, but Netflix, Disney+, blu-ray player and the Dolby Access app all send atmos signal to the soundbar with no noticeable delay. No atmos sound in the XSX menu or in games is able to be played only the other sound format (not DTS-X though).

When the CX has eARC turned off and digital sound out set to passthrough the XSX recognises the soundbar as a Dolby Atmos capable device. The soundbar then receives atmos audio, however delays are now introduced in everthing mentioned above apart from the Dolby Atmos app. The sound delay in this situation, seems not as bad as when the the CX has digital sound out set to auto.

When the CX has eARC turned on and digital sound out set to auto the XSX recognises the soundbar as a Dolby Atmos capable device, however everything has a delay introduced. Strangely Netflix and the bluray app seemed the least affected, but the Dolby Access app and Disney+ it was quite noticeable and in games it was worst.

Yes i know it doesn’t support dolby atmos but it supports dolby digital which xbox series x does and i connect xbox to hdmi into soundbar it does give me option for 5.1 but resolution drops to 1080p

Hi There

With you purchasing the soundbar that supports Atmos, the hardware will tell the console that it is supported (and you ahve changed your output method to Bitstream out, for the soundbar)

As for the Headsets, Dolby requires that you purchase the Atmos app to enable atmos on the headset.

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?

Cheers.