Xbox Series X not playing Atmos in Blu-ray app on 4K Blu-ray Discs

Same issue here.

I’ve got my Series X hooked up to a brand new LG C2 using the HDMI cord that came with the Series X.

I’ve got an Atmos-enabled Vizio sound bar (5.1 + two height speakers in the sound bar) hooked into the TV’s HDMI-Arc port.

I have no issues with Atmos sound when playing games on Series X. I have no issues when watching Atmos-compatible movies in streaming apps like Apple or Disney+.

But, when I play an Atmos-enabled 4K Blu-ray Disc on the Series X blu-ray app, I get this weird audio buffer after a few minutes. The movie may go 20 minutes without, but once is starts going it gets more consistent. This issue persists regardless of which Atmost-enabled 4K Blu-ray I use.

I’ve tried messing with the settings - switching back and forth on allowing pass through, etc.

Funny thing is, on my older TV (a TCL Series 6 which was not VRR or 120 hz compatible) I had zero issues. My Series X would play Atmos 4K blu-rays no problem. Only difference I can think of is that on my old setup I hooked the Series X directly into the input of the sound bar and then output from the sound bar into the TV (it was the only way I could get Atmos to work on the old TCL Series 6). On my current set up with the LG C2 I don’t do that because passing the Series X through the sound bar would take away the VRR and 120 hz capabilities my new TV can do.

Can anyone help?

To clarify;

PlayStation 1 - CD-ROM

Sega Saturn - CD-ROM

Sega Dreamcast - GD-ROM - A proprietary disc format

PlayStation 2 - DVD

Nintendo GameCube - Nintendo Optical Disc

XBOX - DVD

PlayStation 3 - Blu-Ray

XBOX 360 - DVD

Nintendo Wii - Wii Optical disc (basically DVD)

Wii U - Wii U Optical disc (basically Blu-Ray)

PlayStation 4 - Blu-Ray

XBOX One, One S and One X - Blu-Ray

PlayStation 5 - Blu-Ray

XBOX Series X - - Blu-Ray

xbox one "will" support 4k blu-rays in the future. They just haven't announced it when it will. So if you buy 4k blu ray movies they will not play yet on the xbox one. as with standard blu rays I find it only noticeable on larger blu ray tvs. I have
a 4k 70in tv, the only way I can currently see blu ray formatted shows is on the built in apps in the tv. Mainly Netflix.

I saw it has HDMI 2.0B thingy on this site.

If say you connect an Xbox One X to your 4K HDTV, you should still be able to:

1. Download the YouTube and Netflix apps, onto your Xbox One X, and still be able to watch in 4k 60fps?

2. Use Xbox One X 4k Blu-ray player to watch 4k Blu-ray disc movies in 4k 60fps?

3. Play games on Xbox One X, in 4k 60fps?

.... right?

Do you have a Dolby Atmos compatible receiver, sound bar, or speaker system? If you do, have you changed the settings within 'Disc & Blu-ray settings' on your Xbox One to enable 'Let my receiver decode audio'? Currently Dolby Atmos is only supported within
the Blu-ray app for Dolby Atmos compatible Blu-Ray movies.

Keep us posted!