Dolby Atmos via eARC new XBOX Series X

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

Hello AnchelLabena,

We appreciate you for bringing this up to Xbox Forum.

We are sorry to hear that you’re experiencing audio delay when using Dolby Atmos for Home Cinema on your Xbox Series X with LG OLED C2 TV and Samsung Q950T Dolby Atmos soundbar.

We've found similar issues with LG OLED and LG Atmos soundbar (with rear speakers) and used an earc extractor (4k Dolby Atmos compatible) which completely solved the problem. You pass the audio HDMI earc out from the TV through the extractor and into the HDMI in of your sound bar.

Another user, states having delays using the Xbox Series X with Dolby Atmos games and apps such as Youtube and Gears 5 but NOT from the Dolby Atmos app’s demos. The Xbox is connected directly to their LG BX TV via the HDMI 2.1 and using eARC > ARC on their Onkyo TX-NR656. The TV’s apps do not cause this delay using Atmos, and the Dolby App on the Xbox.

We also found an explanation from another that the delay exists because natively, surround audio from a gaming console is in LPCM. To output a bit streaming format (or in this case a proprietary PCM codec like DOLBY MAT 2.0) it has to re-encode the audio real-time which introduces delay. And keep in mind ONLY a very select few games are in Atmos.

It's good to know that connecting the Series X directly to the soundbar works just fine and Atmos content will play as intended with no delay. However, this causes a loss in other features such as VRR, 120 Hz and more due to the soundbar not supporting all HDMI 2.1 features.

We understand that you want to do the setup with the console connected directly to the TV, as should be intended. We hope that the information we provided is helpful.

If you have any other questions or concerns, please let us know.

We will be glad to follow up and help you.

Sincerely,



Moderator

Microsoft Community

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.

Hi Napalm

Because my tv set Samsung is not so new and doesn't decode Dolby Atmos that is the reason for which I bought the XBOX ONE X to install the Netflix app in Xbox and to take out the Dolby Atmos from Xbox in Onkyo amplituner.

Now, when I open the Netflix app on Xbox I can see which movie has or not the sound in Dolby Atmos. This feature can't see directly on Netflix app on Samsung because tv set Samsung is an old version and doesn't have eARC.

Now, like I said ALL the GAMES and ALL the movie (Netflix) played on XBOX are in Dolby Atmos , no matter that they are or not in that sound format. THIS IS THE "PROBLEM".

Thanks

Romeo

Im sure there will at some point with Dolby Atmos coming to Xbox One, maybe it'll come to the new Xbox Series X?