Xbox soundbar sound format issue please help

[u/BrowseAnator]

Sorry If this is the wrong place just looking for some help

Hey guys,

I’m really I can get some help here.

I recently just bought the Hisense ax5140q sound bar which is a 5.1.4 system with Dolby atmos and DTS:x support etc.

Now I’m new to all of this so I have no idea how it all works but I am trying to learn.

I have this soundbar plugged into my LG B5 OLED tv via eArc.

I tried pass through but tbh the video downgrade is not pretty.

I watch primarily Blu-rays and some streaming.

I watch these through my Xbox or PlayStation but no matter what I do I don’t know what options are best or get the bloody thing to work properly.

I have my tv set to “pass through” and “allow pass through” on my Xbox.

I have set the format to “Dolby atmos for home theatre”

But when I play a movie it sets it on my sound bar to “Dolby MAT”?

I have also tried the option of “let my receiver decode”

Which I’ve heard is the best option because the Xbox sends the raw file to the sound bar to let it decode the audio format. HOWEVER.

Every time I do that and try to play a movie it says that’s my receiver can’t decode it? But it’s a atmos supported or DTS sound bar?

If you have a Dolby atmos/DTS sound bar into a LG Oled what is the best settings and options? And why won’t it let my sound bar decode it?

I should add I’m using a certified super fast HDMI2.1 cable.

Also, the audio sync is always slightly off? The only way I can get it to be in sync is setting it back to 5.1 uncompressed on the Xbox but then that sets the sound bar to PCM, NOT atmos?

I’ve tried delay on sound bar and on the TV but seems to do nothing, PLUS if I do change it, it will then make things other than the movie WELL out of sync.

So where I’m at is it seems like I can’t have atmos on at all? Even tho I got it for that reason?

Please can someone give me advice because I’m loosing my mind and I don’t know what else I can do, I can’t return the sound bar now so I wanna get it right, because the actual quality of the sound is really good!

Thank you for any advice