Xbox Series X HDMI output and Blu-ray app are pretty sub-par

I have the same problem. If I use Dolby Atmos output over HDMI there is an annoying audio delay when playing blu-ray or 4k discs. Changing the output to uncompressed 7.1 seems to fix the issue, but I would rather use Atmos. I do not have this problem with streaming, only with discs. My setup is Xbox Series X to a Marantz SR6012 via HDMI and then HDMI to a 75" TCL 6 series TV. My speaker configuration is 5.2.4.

If you're doing everything with HDMI then ditch the optical cable. If your Blu-ray player is also a surround system, then you need to have your xbox go into the blu-ray's Input port. From the Blu-ray's HDMI Output port, go to the TV. Programming is all that
should be left.

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?

Wrong... He's specifically asking if it will pass 4k from another device hooked up to the "IN" HDMI port.

HDMI 2.0 output, HDMI 1.4 input. It will not ever pass 4k.

YCC was not enabled but, but color was, No updates for blu ray app. I am thinking it is the blu ray app as netflix on xbox outputs Dolby Vision without issue

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?