That worked. I changed some of the tv audio output settings. I now got this showing on my app. I guess that's fixed it? Thank you.

A DTS-HD Master Audio and DTS:X track has a core lossy DTS Digital Surround track. This is similar to Dolby TrueHD having a core Dolby Digital track. DTS Digital Surround is what Sonos will begin to support. From what I can tell, DTS Digital Surround has a slightly higher bitrate than Dolby Digital, so the audio should sound a little better than standard Dolby Digital.

• If your TV and soundbar have HDMI ARC (like the Beam Gen 1) and your TV has DTS passthrough, when you play a DTS-HD Master Audio or DTS:X disc, you will get DTS Digital Surround audio (after the DTS update). 
   
• If your TV and soundbar have HDMI ARC and your TV has Dolby Digital passthrough, when you play a Dolby TrueHD or Dolby Atmos disc, you will get Dolby Digital audio. 
   
• If your TV and soundbar have HDMI eARC (like the Arc or Beam Gen 2) and your TV has DTS passthrough, when you play a DTS-HD Master Audio or DTS:X disc, you can get DTS Digital Surround audio (after the DTS update) OR multichannel PCM (depending on your player’s settings). 
   
• If your TV and soundbar have HDMI eARC and your TV has Dolby Digital/TrueHD passthrough, when you play a Dolby TrueHD or Dolby Atmos disc, you will get Dolby TrueHD or Dolby Atmos audio.

I’m hoping this DTS update will be just the first step to Sonos eventually supporting DTS-HD Master Audio and DTS:X over eARC for the Arc and Beam (Gen 2).

@joanna72 Set Pass Through Mode to ON or AUTO.

Yes, it is true. But from what I can tell, it only appears to be lossy DTS Digital Surround support, not support for lossless DTS-HD Master Audio or DTS:X.

“Sonos also plan to add support for decoding DTS Digital Surround later this year via the S2 platform on Playbar, Playbase, Amp, both generations of Beam, and Arc.”

I also saw this and was surprised at how under the radar this news is!

As a long suffering Sonos user who loves using Disk Format, i’ve had to jump through hoops to get DTS to play on my setup, and after years of Sonos telling me that this nuisance wasn’t their concern, they’re finally bringing DTS support to their home theatre products!!!

It might be a little downplayed because they’ve now allowed all eArc devices to process Multichannel LPCM devices so we’re covered for full surround for more DTS disks (though I’m not sure about DTS:X), but this doesn’t solve anything for the Playbar -- which is part of the DTS update.

It’s still a head scratcher that none of the higher end DTS formats are being supported though - guessing technical issues and too much development cost plays a part.  Lets be honest -- disk using purists who crave the highest level of audio quality are a quickly shrinking minority.

@GDaz Regardless of the player you are using, multichannel PCM will always be higher quality audio than DTS Digital Surround. The former is a lossless, higher resolution audio format that contains much more audio data, whereas the latter is a lossy, more compressed audio format very similar to standard Dolby Digital. But ultimately, use your ears to determine what sounds the best to you.

Sonos is still working on the 7.1 to 5.1 downmixing issue. But I have noticed an improvement with DTS discs on my UB820 player. I have the Arc/Sub/Play:1s setup. Using a 7.1 DTS Sound Check on a DTS Demo Blu-ray disc, the two rear surround channels used to not play any test tones out of my Play:1s. Only the two side surround channels would play audio. Now all four surround channels play audio out of my two surround speakers. The Sonos app still displays the audio as 7.1, but it sounds like the 7.1 mix is being properly downmixed to 5.1.

There is an Audio Advice video that mentions a November 21 update. Start at the 4:06 mark:
 

It is. A lot of TVs simply won’t do it, and that’s probably one of the many reasons why Sonos has been slow to implement the feature - it’s not going to reach everybody. Samsung and LG are big offenders here - they’re probably not willing to pay for the licencing. Recent Sony and Hisense TVs are probably ok. rtings maintain an up to date listing of TVs and passthrough support. I’m not sure if I’m allowed to link it here?

As always a way around it is to use a player that can reencode DTS to Dolby or LPCM on the fly.

I would like to thank the Sonos team for finally taking into account the request of many customers regarding DTS. This was a huge drawback considering the high price of Sonos products.

As a Sonos Beam+Sub owner, I had invested in a Sony UBP-X800M2 player connected to a Sony TV of the same generation (the only combo allowing DTS->LPCM->Dolby transcoding, a miracle I still don't understand). But I know other people who are not so lucky and are stuck in PCM stereo when playing DVD/Blu-ray with a PS5 and the Beam.

Now you'll have to explain how a DTS-MA or DTS-X track from a blu-ray will play on a Sonos soundbar. Is it absolutely necessary for the TV to have a "Passthrougth" feature that supports DTS? Will the signal be "degraded" to simple DTS or can it be converted to Dolby Digital-True HD/Dolby Atmos? I would like to note that simple DTS 5.1 will be a huge step forward, especially regarding dynamics and surrounds, instead of stereo. Therefore, thank you, I'm looking forward to the details and future announcements.

This link may help explain it for you…

https://www.avsforum.com/threads/all-earc-tvs-come-without-dts-2021.3180506/

Hi, yes your C8 does passthrough and yes it supports DTS as a codec. You can enable the passthrough option in the audio menu on the TV. DTS is basically like Dolby Digital 5.1 for reference and the one Sonos will be supporting. DTS:HD is like the equivalent of 7.1 and DTS:X is like equivalent of Dolby Atmos although both those two won't be supported, but should get mixed down to standard DTS or multichannel PCM. 

I am very happy my Sonos ARC 5.1 setup now processes Multichannel PCM 5.1. A huge sound difference compared to the previous Stereo PCM only when playing any DTS Blu-ray formats ( even though it displays as Multichannel PCM 7.1 on the Sonos app)

Not sure what happened in the industry where I guess Sonos thought DTS was on its way out and didn't include support for DTS in their ARC system till very recently?. From my vantage point, it seems many of the new 4K Blu-ray conversion disks I buy are coming with DTS and not Dolby Atmos! 

Unfortunately, I had to buy a second 4K/UHD Blu-ray player to hear Multichannel PCM 5.1 through my TV the LG OLED CX to the Sonos ARC. For some reason, Sonos Arc and the expensive Panasonic DP-UB20 Blu-ray player can't pass/process  Multichannel PCM through the LG CX TV when playing all these new 4K movies that come with DTS. This combination only allows Stereo PCM with a a barely audible fake surround sound coming from the rear speakers. I mean you really have to put your ear to one of the back speakers to hear a slight fake surround sound. So if you own Sonos ARC and looking for a new 4K UHD Blu-ray player, the Panasonic DP-UB20 might not be the best choice if you want to hear Surround Sound on all your DTS blu-rays/4K blu-ray's. 

When I bought and played the same Blu-rays with DTS only through the budget Sony UBPX700 UHD Blu-ray player with the LG CX TV and Sonos ARC, the room filled with true 5.1 surround sound with DTS processing as Multichannel PCM 5.1. Wow what a difference compared to the miserable and muffled PCM Stereo signal! 

Now I wonder what will happen to Multichannel PCM 5.1 when Sonos Arc comes with support for DTS? If I understand correctly Multichannel PCM 5.1 is a better quality sound than base DTS? Will Sonos allow for processing both? Maybe Multichannel PCM 5.1 through the PCM audio setting on the Blu-ray player and DTS through setting the audio to  bitstream on the Blu-ray player?

My app is showing DTS Surround sound 5.1 now after the update. I have Panasonic VT60 hooked to Nvidia shield and I am playing my stream through Kodi which is setup as Passthrough.

DTS working okay here too..

Blu-Ray Player to Sonos Arc LG C9 TV set to ‘pass-through’

As an update to my post further up, I have the UB820 and am now getting DTS 5.1 for my DTS Blu Rays.

The only downside is it required me to toggle eARC off for the Arc, but it’s easy to toggle it on/off, and actually having it off still gave me Atmos and the like.

I can talk through my settings if helpful?

Player settings (UB820):

DTS/DTS-HD - Bitstream

BD-Video Secondary Audio - Automatic

LG B9 settings:

Digital Sound Out - Passthrough

eARC - Off

 

Mine is a B9 but someone with a C9 has said this worked for them too. It may not work for CXs but worth giving a shot.

B9 and C9 can pass DTS as have the codecs. C1, CX new ones etc had codecs removed. 

Thank you. Sadly for me, not the solution through my LG CX TV and my Panasonic UB820. But was worth a try as I was hoping maybe it would at least allow LCPM to pass through from the Panasonic UB820. 

Happy for you! I know how meaningful the sound experience when you can play a DTS only Blu-ray without miserable PCM Stereo on the Sonos Arc. When I switched to using the Sony Blu-ray player for DTS only blu-rays and heard Multichannel PCM Surround Sound for the first It was a jump for joy! 

Hello, I’m excited to get DTS working on some of my movies, but for some reason not all of them work. DTS-MA 5.1 movies ouput DTS 5.1 Surround with no issues. However, when I play DTS-MA 7.1 movies, I get Dolby Digital 2.1. Any ideas why? I assumed both DTS-MA 5.1 and DTS-MA 7.1 would downgrade to DTS 5.1 Surround. Thanks in advanced.

Here’s my setup

TV: Sony X900H, passthrough enabled in audio settings

Soundbar: Sonos Arc plugged in eARC input

Source: MakeMKV Bluray rips running on my NAS

Software: Plex in native TV software, had to change output to optical to get any 5.1 audio

Have just discovered this thread whilst trying to test DTS through my setup. I have the (dreaded) UB820 player and a Panasonic HX940 series TV. My Sonos setup in the room is a Playbar and Sub.

After much huffing and puffing and panicking about the performance of the Blu-ray player (after reading this thread!), I eventually deduced that the TV was my weak link. It would happily passthrough Dolby 5.1 (audio out from player via HDMI and then from TV to Playbar via optical) but DTS was showing as PCM Stereo in the Sonos app.

Did some digging around and found that the TV doesn’t support DTS. So I tested running the optical cable direct from the UB820 to the Playbar and it worked flawlessly.

Now I just need to order a second optical cable and remember to switch them over in the back of the Playbar when playing physical media. As much as I might like to use this as an excuse for a new TV, I don’t think it will fly...

It’s taken too long for Sonos to bring DTS to the playbar and beam. But I’m so pleased to have it even in its basic format.
 

I can now play 4K ultra Blu-Ray with 5.1 surround sound. James Bond Skyfall just sounds amazing. 
 

I’m using:

sound: playbar, Symfonisk surrounds and sub. 
tv: LG OLED55C7
blu-ray player: Panasonic UB154EB

Maybe it’s an issue with the TV firmware then? I have the LG C9 TV, firmware version 05.10.25 and DTS 5.1 works whether I set HDMI-2 to Arc or eARC. (I have my Digital Sound Out set to pass-through and the DTS codec is set on the Blu-ray player in my case).

I particularly like this line:

But ultimately, use your ears to determine what sounds the best to you.

You probably can get an optical switch as a good compromise.