I have both 1x and series x, and both work fine with my equipment (2016ish roku/tcl tv and yamaha rxv 583). (I do get an occasional non-reproducible glitch that will desync video/audio that a quick rewind fixes, but other than that works as expected)
If you are trying to pass through the TV to the sound bar, its not likely going to work.
Optical will not work either.
its the same as the shield would require:
xbox/shield > hdmi > compatible avr/soundbar > hdmi > 4k tv
Aaah ok got it. I have the Xbox going directly to the TV which then feeds the soundbar via digital audio out through the optical cable. Is their a reason this wonât work for audio passthrough? Is the optical connection not capable?
The soundbar supports 5.1 DTS and DTS HD TruSurround.
I guess I may have an excuse to upgrade my home theatre tech if this setup just wonât work for passthrough 
ARC and optical only supports up to AC3/dts (non hd).
keep in mind, there are multiple audio codecs that do surround, TRUEHD and DTS HD MA are LOSSLESS high bitrate, which require hdmi 2.0+ and a direct connection to the sound bar or AVR (not tv).
you would need a new tv and soundbar that both support E-ARC to get truehd/dts-hd to pass through via hdmi 2.1.
you can google all about ARC and optical pass through limitations if you really want to know the technical details.
you donât need a new tv so much, as a new AVR or soundbar, that you plug the xbox directly into (not into the tv!).
Ok thanks for the info! Iâm actually in the process of moving to a new place so I will have to add a new soundbar or AVR, plus a new Samsung 4K that Supports E-ARC (my Samsung now is around 2013-2014 and only supports ARC).
Would you say with audio passthrough the Xbox SeriesS/X is on par with the Nvidia Shield as one of the top clients now?
My only other issue was that I have some 1080i blu-ray files (Sherlock Complete Series Blu-ray for example) that wonât direct play properly even though they have EAC tracks. Do you have any of those episodes from blu-ray you could test to see if they work properly? I have to turn off frame rate switching to get it to play and even then it stutters.
I also had the issue on Apple TV 4K but when they added support for integer frame rates the problem disappeared. I wonder if Microsoft has anything like that already available for the xbox or would that need to be added for a future update? The Xbox Series S/X would likely take over the Nvidia shield market as it is more than capable of gaming for a casual person, and audio passthrough for Plex and streaming users. Best of both worlds if they can get everything sorted for playback.
On par, no. Good competition, for sure.
The shield (pro) is still superior in several areas, including subtitles compatibility, cost, flexibility in other apps outside of plex (ie side loading etc), and a bit more mature with 4K/pass through experience.
Many people buy/recommend shield only/specifically for plex including myself).
I donât think anyone would or should recommend an Xbox strictly for only plex. At least not yet.
All that said, Xbox is becoming my primary plex player.
So Iâm having trouble getting this to work.
I have XSX plugged into CX and then use eARC to passthrough audio to receiver but itâs not working here. I only get LPCM. Using 7.1 uncompressed with allow passthrough checked.
For lg cx, DTS will not pass through earc (this is expected and due to this the option to enable/disable DTS should be reinstated in the Plex Xbox app, like it was in preview builds). TrueHD through eARC pass through works for me. Atmos should also work, but I donât have a setup to test. If youâre using a SHARC, dip switch #1 must be in the up position.
Here are my settings in the LG CX settings menu that might work for you:
Earc: on
HDMI format: bitstream
Out: pass through
Hi all
Was having a bit of an issue with this last night, tried two files with DTS-HD audio tracks. It would play perfectly fine and would show in Plex dash that it wasnât transcoding the audio.
However, after anywhere from 5-20mins it would quickly buffer and then when it came back on my receiver would just show DD Surround and looking at Plex dash it would be transcoding.
Pausing and restarting or changing audio tracks to something else an then back to the DTS-HD track wouldnât fix it however stopping and resuming the film would fix it until it would do the same again in 5-20 mins.
Havenât had chance to try an atmos file to see if it would do the same.
Bizarrely it just seems like after that sort of time period it would lose the ability to pass through and would resort back to transcoding.
This is with a Series X connected directly to a Denom X1600h.
Anyone had anything similar?
Ah â â â â yeah forgot about not DTS on LG, I will order the HDMI 2.1 fixer box for my X2700H and hopefully be able to plug console into AVR without issue. Cheers.
I have my series X connected directly to my Denon X1600H and have not experienced the same issue. If I do though I will update here.
Release notes state an issue with DTS Sound Unbound being investigated. Has anyone gotten DTS decoding to work on the Xbox itself using DTS Sound Unbound (i.e. Plex direct play DTS to Xbox, Xbox decodes DTS, AVR plays 5.1 PCM using eARC connection to TV)?
Did these settings not make it to public release? I canât find those on my latest update.
Hi there,
I can agree with some of the others here that it appears that the passthrough doesnât work. Iâm using the Core Universe (Dolby Atmos/Dolby TrueHD) provided by the The Digital Theatre (http://thedigitaltheater.com). It seems that the Plex Media Server is still transcoding the audio from TRUEHD to AAC even though passthrough has been configured for xbox series x. Just to point out that my soundbar (Samsung Q950A) is capable of Dolby TrueHD, so Iâm not sure why PMS is still converting the audio file to AAC. Let me know If any logs is needed and Iâm glad to assist on this matter
Iâm not seeing this in public release either. One of my users tried to change the settings in Plex, but they werenât available. Can someone from Plex explain why some users donât have the updated app?
With those options it would help a lot of users with LG CX and above and also Sonos users. I hope itâs not permanently omitted and will return.
@Moussa When is the update with audio passthrough going to roll out to ALL users?
Is the Xbox plugged into the sound bar?
If not does both the tv and sound bar have e-arc?
Regular arc does not support truehd pass through.
Neither does optical.
Yep, Xbox is connected directly to Soundbar. What funny is I played around more yesterday and managed to get TrueHD for H264 + TrueHD in MKV but failed to get TrueHD in HEVC + TrueHD in MKV format.
maybe try a newer hdmi 2.1 certified cable?
also, there are some compatibility issues between xbox and some AVR/soundbars.
Not sure if this is the case since the Xbox is capable to do TrueHD just fine. It seems to only fails to do so when video is HEVC (MKV Container) and Plex transcode TrueHD to AAC
