LG C9 + Arc + UB820 / Multichannel PCM for DTS Blu-Ray discs



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@iBoyley Yes, the primary purpose of the Arcana is to provide eARC capabilities for users with TVs with HDMI ARC only. But the Arcana can also allow users to bypass ANY TV with lip sync problems, audio limitations, or handshake issues too, and the LG CX is one of those TVs.

If you are waiting for LG to address the problem, you could be waiting a very long time.

Im not sure who’s at fault however the LG CX is able to pass LPCM from both my Series X and PS5 so that leads me to believe the issue is with the Panasonic somehow

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@iBoyley Yes, the primary purpose of the Arcana is to provide eARC capabilities for users with TVs with HDMI ARC only. But the Arcana can also allow users to bypass ANY TV with lip sync problems, audio limitations, or handshake issues too, and the LG CX is one of those TVs.

If you are waiting for LG to address the problem, you could be waiting a very long time.

Im not sure who’s at fault however the LG CX is able to pass LPCM from both my Series X and PS5 so that leads me to believe the issue is with the Panasonic somehow

The Panasonic player is capable of outputting multichannel PCM audio from DTS-encoded Blu-rays. This has been confirmed from other users, including myself. The problem is a specific handshake issue with LG and the Panasonic UHD player. You can wait for LG or Panasonic to address it, or you can use your Xbox and PS5, or get the Arcana, and enjoy your Arc today.

Purchased HDFury Arcana and am now able to get Multichannel PCM 7.1 through Sonos while watching a DTS-X disc on my LG CX and Panasonic 820.

However, this only works if you plug the Panasonic directly into the Arcana via the HDMI IN port. So it appears that I will need to use an HDMI switcher for my other devices (Apple TV 4K, PS5, Fios, and Nintendo Switch) so that they can all plug directly into the HDMI IN port of the Arcana.

Someone above suggested that for e-ARC televisions, it would not be necessary to plug the devices into the Arcana because the e-ARC TV would act as the “switcher”. However, when I tried plugging the Panasonic directly into the TV via HDMI like I usually do, I was only able to get Stereo PCM 2.0 through the Arc.

My next thought was to connect only the Panasonic to the Arcana through the HDMI IN port and leave my other devices (Apple TV 4K, PS5, Fios, and Nintendo Switch) connected directly to the TV via HDMI. But when I tested a Dolby Atmos Netflix film on the Apple TV, I was getting “Dolby Atmos (DD+)” through the Arc. When I used to watch Dolby Atmos content on Netflix, the Sonos app showed “Dolby Atmos”.

I did some research and it appears that the “(DD+)” indicates that the Arc is not connected via e-ARC, only regular Arc. I believe this is a lossy Atmos rather than lossless.

All in all, I’m happy to have found an (annoying) solution and will need to purchase a different HDMI switcher because my current one only has 3 external ports and I have 5 devices that will need to feed into the Arcana.

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You will only get lossy Atmos (DD+) when steaming I believe. The Panasonic should give you TrueHD Atmos from an Atmos disc.

I did a bit of playing today with an LG C9 TV and an old PS3, playing a Blu-ray movie. Initially set to bitstream output on the PS3 and TV, the Movie output its audio as Uncompressed Dolby TrueHD. There was no Atmos metadata, but that’s irrelevant here for the following test. 

My purpose was to then see if the LG C9 TV would pass-through multichannel LPCM 5.1 uncompressed audio, as I had seen some users mention earlier in the thread (and elsewhere on the forum) that the C9 TV doesn’t support the pass-through of that codec and apparently some were considering getting the Arcana to bypass their TV. Anyhow here is my result … see attached screenshot. 

It seems clear the TV will pass-through multichannel LPCM after all. 

What I had to do to make this work was switch the PS3 over from Bitstream to do ‘on the fly transcoding’ to LPCM in the video settings menu (LPCM transcoding is its default setting anyway) and it will transcode DD and DTS codecs. I then had to manually change the audio output on the connected HDMI port to support the following codecs (do not use the automatic detection setting):

  • DD 5.1/Plus/TrueHD
  • DTS 5.1/HD/HD-MA
  • Linear PCM 2CH/5.1CH 44.1/48kHz

I didn’t bother with 7.1CH or any higher sampling rates as I understand Sonos supports sampling up to 48kHz... and note again these settings were setup manually.

On the LG C9 TV (additional) sound settings. I changed the HDMI input port audio format (HDMI 3 is where the PS3 was attached) from Bitstream to PCM and played the same Blue-ray Movie which arrived at the Sonos ARC as LPCM 5.1. This revealed that the TV will (and does) pass-through the multichannel LPCM codec.

I just thought that info. was worth sharing here, as I see some were considering bypassing their TV sets thinking that the LG C9 didn’t pass-through the codec. The results here tend to suggest the TV will pass it through. 

The TV’s HDMI2 Port for the connected Sonos Arc was set to eARC (obviously) and audio pass-through. TV firmware version 5.00.10

I hope the info above may assist other LG C9 TV owners trying to pass-through the LPCM codec.  

 

 

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@joeytvmusic97 The Panasonic UB820 has to be connected to the Arcana to bypass your TV. That’s the purpose of it.

If you used to get Dolby Atmos audio from Netflix on your Apple TV before connecting the Arcana, you still should be able to get it.

If you are looking for a good HDMI switch that has been proven to work with the Arcana, try this ROOFULL switch:

https://www.amazon.com/dp/B07CF793HQ/ref=cm_sw_r_cp_api_glc_fabc_-iq9FbB1CRZ0C

I am using their 3-port switch and it works well with the Arcana. The only issue I have with it is it doesn’t auto switch inputs. But I have programmed my Harmony remote/hub to take care of the switching.

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Finally pulled the trigger on the Arc but this thread still has me concerned :grimacing: .. I don’t suppose there are any more concrete solutions yet for getting DTS via the Arc with a Panasonic UB450/LG CX?

What are my options?

A word of caution to you because I am in a similar position. If you care about the HDMI 2.1 capabilities of the PS5 (same for Xbox Series X) then a HDMI switch is a no go. At the time of current writing I have not been able to find a switcher on the market that is HDMI 2.1 compliant/capable. 

I have the same issue in that I cannot get Tenet (which only contains 2 audio tracks here in the UK) to play in anything other than stereo through a UB820 player on an LG CX (despite the new software update to the Arc meaning we can do multichannel 5.1 PCM). I considered the HD Fury Arcana but I realised because I have both a PS5 and Xbox series X it’s a no go. The Arcana would need several ports for me to use (Xbox, PS5 and Ub820) that for e-Arc and still use HDMI 2.1 capabilities. As far as I am aware I can’t still output sound from the Ub820 through the Arcana with E-ARC and leave my console plugged into the TV’s HDMI 2.1 ports and output sound from all 3 devices through the Arc soundbar. That would be 2 e-ARC systems (1 being within the TV and the other being the Arcana).

I’ve ripped my Tenet disc and confirmed this has just 2 audio tracks FYI. DTS-HD MA and DD 5.1 unforunately audio described so a no go’er. I cannot get this to work BUT for stereo on the UB820 on an LG CX which for a big budget film I want to have my full surround in use with the sub, Arc and surround old play:1’s that I am using.

So can’t you use bitstream and no transcoding to play the disk in DD5.1 from one of your players?

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Hi @maxwood , for the setup you have, it seems the best we can do at this point in time is to use external hardware to allow for pass-through of Multichannel PCM from DTS type formatted audio output discs through the player. Even with that, it comes through the system as Multichannel PCM 7.1 even when it should be coming through as Multichannel PCM 5.1. This may be better than the alternative without those devices, which is Stereo PCM output.

 

Some have mentioned that it’s working properly even in 7.1 format. I have yet to acquire a disc like @GuitarSuperstar has mentioned above and thus have still not been able to verify that it is working properly for me.

 

The Sonos team has mentioned that they’re working on a proper downmixing from Multichannel PCM 5.1 from Multichannel PCM 7.1 format, but not sure when that will occur.

 

The tool I used, following @Laird M Malamed ‘s info in this thread, helped to get to Multichannel PCM 7.1 instead of Stereo PCM output, is the DR HDMI 4K device. I used it on Windows 10 with the USB connector that comes with the device. This device sits between the Panasonic and the LG TV. This requires a bit of work to save a proper setup to the device by sinking data from your TV and then modifying it on your computer. You can follow the posts in this thread for guidance. Others have mentioned that the HDFury Arcana works automatically, but I have not tried that route.

 

I can say that playing Zelda: Breath of the Wild with Multichannel PCM 7.1 is a lot better than Stereo PCM output, even if I am losing some sounds due to not being downmixed to 5.1 properly, but that may not be the case for other media. For now, I’m mostly watching Dolby audio movie discs...I don’t know if we’ll ever get a proper DTS conversion through the LG TV, but I am hopeful. Good luck, and if you learn anything new, that would also be great to hear!

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Purchased HDFury Arcana and am now able to get Multichannel PCM 7.1 through Sonos while watching a DTS-X disc on my LG CX and Panasonic 820.

However, this only works if you plug the Panasonic directly into the Arcana via the HDMI IN port. So it appears that I will need to use an HDMI switcher for my other devices (Apple TV 4K, PS5, Fios, and Nintendo Switch) so that they can all plug directly into the HDMI IN port of the Arcana.

Someone above suggested that for e-ARC televisions, it would not be necessary to plug the devices into the Arcana because the e-ARC TV would act as the “switcher”. However, when I tried plugging the Panasonic directly into the TV via HDMI like I usually do, I was only able to get Stereo PCM 2.0 through the Arc.

My next thought was to connect only the Panasonic to the Arcana through the HDMI IN port and leave my other devices (Apple TV 4K, PS5, Fios, and Nintendo Switch) connected directly to the TV via HDMI. But when I tested a Dolby Atmos Netflix film on the Apple TV, I was getting “Dolby Atmos (DD+)” through the Arc. When I used to watch Dolby Atmos content on Netflix, the Sonos app showed “Dolby Atmos”.

I did some research and it appears that the “(DD+)” indicates that the Arc is not connected via e-ARC, only regular Arc. I believe this is a lossy Atmos rather than lossless.

All in all, I’m happy to have found an (annoying) solution and will need to purchase a different HDMI switcher because my current one only has 3 external ports and I have 5 devices that will need to feed into the Arcana.

A word of caution to you because I am in a similar position. If you care about the HDMI 2.1 capabilities of the PS5 (same for Xbox Series X) then a HDMI switch is a no go. At the time of current writing I have not been able to find a switcher on the market that is HDMI 2.1 compliant/capable. 

I have the same issue in that I cannot get Tenet (which only contains 2 audio tracks here in the UK) to play in anything other than stereo through a UB820 player on an LG CX (despite the new software update to the Arc meaning we can do multichannel 5.1 PCM). I considered the HD Fury Arcana but I realised because I have both a PS5 and Xbox series X it’s a no go. The Arcana would need several ports for me to use (Xbox, PS5 and Ub820) that for e-Arc and still use HDMI 2.1 capabilities. As far as I am aware I can’t still output sound from the Ub820 through the Arcana with E-ARC and leave my console plugged into the TV’s HDMI 2.1 ports and output sound from all 3 devices through the Arc soundbar. That would be 2 e-ARC systems (1 being within the TV and the other being the Arcana).

I’ve ripped my Tenet disc and confirmed this has just 2 audio tracks FYI. DTS-HD MA and DD 5.1 unforunately audio described so a no go’er. I cannot get this to work BUT for stereo on the UB820 on an LG CX which for a big budget film I want to have my full surround in use with the sub, Arc and surround old play:1’s that I am using.

 

Why do you need to run the PlayStation and Xbox through the Arcana and not plug them into the TV?

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@Ken_Griffiths Thanks for the info. We have determined that the LG can pass through multichannel PCM. The problem has always been the LG working with specific external media devices. In this case, it is the Panasonic UB820 UHD player.

Sadly, I don’t have the UB820 to test, but at least the Arcana works okay looking at your earlier posts. 

...it appears the devices ‘handshake’ rather than the ‘pass-through’ on the TV may have some issues. I did have to manually force the handshake to get the PS3’s multi-channel LPCM 5.1 codec as it’s ‘sound out’, to then pass-through the LG TV ports, otherwise had I set the PS3 to its default auto settings, I am fairly sure it would have transcoded the audio to PCM stereo only.

Yes you are now the fourth person to suggest it being a handshake issue. 

The TV can pass LPCM through from other devices such as XSX or PS5 but for some reason not the UB820 which is capable of outputting it. 

 

When you say you had to manually force a handshake, what did this involve exactly?

@Ken_Griffiths Thanks for the info. We have determined that the LG can pass through multichannel PCM. The problem has always been the LG working with specific external media devices. In this case, it is the Panasonic UB820 UHD player.

Sadly, I don’t have the UB820 to test, but at least the Arcana works okay looking at your earlier posts. 

...it appears the devices ‘handshake’ rather than the ‘pass-through’ on the TV may have some issues. I did have to manually force the handshake to get the PS3’s multi-channel LPCM 5.1 codec as it’s ‘sound out’, to then pass-through the LG TV ports, otherwise had I set the PS3 to its default auto settings, I am fairly sure it would have transcoded the audio to PCM stereo only.

Yes you are now the fourth person to suggest it being a handshake issue. 

The TV can pass LPCM through from other devices such as XSX or PS5 but for some reason not the UB820 which is capable of outputting it. 

 

When you say you had to manually force a handshake, what did this involve exactly?

On the PlayStation I was using, under its sound settings, I ‘manually’ added the LPCM 5.1 codec with sampling rates of 44.1kHz and 48kHz to the audio-out on the HDMI port connector.. if left set to automatic the ‘handshake’ does not include that codec when connected to the LG C9 TV - it showed it as supporting LPCM 2.1 channels only, at various sampling rates, (which is correct for the TV audio output). The TV however will allow the ‘pass-through’ of the 5.1 codec through its own ports, even though it doesn’t support it and hence I was able to get it to work with the Arc.
 

Hope that answers the question.

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So Panasonic responded to me directly contradicting all advice that i have come across online

 

“I would like to inform you that the Technical Department has advised that this Blu-Ray player would not be able to send out PCM content as 5.1 or 7.1 as this is a Downmix to 2.1 channel only. The unit is only capable of outputting 5.1 or 7.1 audio format in Bitstream.”

 

 

The issue i have is when i select the playback info screen it always displays 2ch Stereo regardless of whether DTS is set to Bitsteam or PCM in the device settings

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So Panasonic responded to me directly contradicting all advice that i have come across online

 

“I would like to inform you that the Technical Department has advised that this Blu-Ray player would not be able to send out PCM content as 5.1 or 7.1 as this is a Downmix to 2.1 channel only. The unit is only capable of outputting 5.1 or 7.1 audio format in Bitstream.”

 

 

The issue i have is when i select the playback info screen it always displays 2ch Stereo regardless of whether DTS is set to Bitsteam or PCM in the device settings

Panasonic’s Technical Department is wrong. I have the UB820 and I am getting it to send 5.1/7.1 PCM to the Arc.

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You are a legend Laird. 

I've got all my fingers crossed that you get something back from Panasonic suggesting they accept the problem is theirs and they intend to fix it. 

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Has anyone contacted LG about this issue yet?

Has anyone contacted LG about this issue yet?

I think I will contact both Panasonic and LG about this because like Surge mentioned above, I don’t want to spend another £200 on a HDFury Arcana. I’m not sure whether the fault lies with LG (C9 tv), Panasonic (UB820) or Sonos (Arc) because dependent upon what I am using I get different results:

PS4/5 & Pc - All play multi channel lpcm

UB820 set to PCM with DTS soundtrack movie (e.g. Gladiator 4k or Lone Survivor) and C9 set to Passthrough- PCM 2.0

C9 set to PCM with a ripped DTS movie soundtrack on a USB memory stick (hence totally bypassing the UB820 since it is plugged directly into the tv) - PCM 2.0

 

I received my HDFury Arcana today and I have some positive preliminary results to share, certainly in regards to the Panasonic 820 output. I need to do more tests. But so far, success with DTS multichannel to PCM Multichannel into the Sonos Arc while retaining correct Atmos playback in True HD format.

 

Here is my set up:

Sources:

Panasonic 820 4k Player

Apple TV 4K

Tivo Bolt

(I have a Nintendo Switch, but I have not connected it to the TV to try with this.)

 

Display: LG 55” C9 (2019)

 

Audio: Sonos Arc 5.1 set up

All devices are on latest firmware.

 

The Arcana arrived via DHL from Taiwan. I ordered on Jan 1, it shipped on Jan 4 and arrived today, Jan 8. Product arrives in a blister pack and includes the Arcana, a USB cable and a power plug (with US plug in my case). No documentation - that is all online. Firmware came as .79 (which was released in Nov in parallel with the Arc’s update to support PCM multichannel audio). I updated, via USB stick, to the December release which is .80 and that fixed some Xbox items according to the notes. Arcana build quality is fine. Not super great, but survivable for a part that likely just sits without much interaction. Menus are nicely laid out and easy to read on the OLED screen.

 

Happily, my theory that I could use the TV as switcher was accurate for the non-820 sources! 

 

My set up now:

820 via 8k ethernet HDMI cable to the Arcana HDMI in (I doubt I need this high a cable for this, but it is what I had)

Arcana HDMI video out to LG input 2 (ARC port), with a 18 gbps /ethernet cable 

Arcana HDMI eARC output to the Sonos input via 18 gbps ethernet

 

AppleTV 4K to LG input 1

Tivo to LG Input 4 

(the 820 used to be in 3 on the LG, hence the gap)

 

820 has Dolby tracks in bitstream format for output

820 has DTS tracks going out via PCM for output

BR Secondary audio is off

 

From the Hobbit 4k disc, I get Atmos (True HD) to the Sonos - as expected

From the LA Phil 100th Anniversary Disc, I get 2.0 PCM from the 2.0 PCM track AND….

7.1 (but only 5.1 source) from the DTS MA track. (This disc features a 2D and a 5.1 mix.)

From the new Eiger Sanction blu-ray release, I get PCM 2.0 from the DTS MA track (which might be in 1.0 format)

I am sending 4k 4:4:4 picture (native for the Hobbit, upsampled by the Panasonic for 1080 sources). The Arcana can do this too, but I did not see the need for that.

(Note, I tried to adjust the Panasonic to match the disc channels - e.g. 5.1 for 5.1 - but it seems to always want to send 7.1 - even when I changed the down mix settings. I need to tweak more.)

 

When I switch to the Apple TV on input 1, the LG correctly passes the bitstream back to the Arcana via eARC, which routes it to the Sonos. (I think it’s crucial to the have the Panasonic off for this to work.) I can get 5.1, Atmos (DD+), and 2.0 PCM - all as expected based on the programming source. Picture is 4K Dolby Vision when the source allows.

 

Here I have a flag on synchronization between the TV and Sonos. I feel like when I watched Rise of Skywalker via Disney+ that the Atmos audio was slightly late which would be attributed to the extra hop through the Arcana. However, when I watched the same movie via my Apple iTunes Movies version, it was in sync. I looked at Rebecca on Netflix which has Atmos, and it seemed in sync or very close. I did run the Wireless Sync on the AppleTV. but I am not sure that impacts wired connections. There are no settings on the TV that I know of to make the picture lag - only to make the sound lag which is not helpful. I tried both Passthrough and Auto for the ARC Out setting (and with bitstream as the format).

 

I only flipped through a few channels on the Tivo and it all seemed in sync. The Tivo is sending Dolby Digital through and it seemed in sync.

 

So, I think I have what I want. Great 4k player that can drive the LG and Sonos with any disc I want to play and with the correct channel output and nicely upsample lower res images. Ability to use multiple sources with the LG and not need a switcher as well.

 

More to follow as I play around more this weekend and watch feature length content. 

 

And do I think this should be necessary? Heck no! As noted in a previous post, having to spend $200 more to solve a connection problem seems wrong. But if the issue is with the LG CEC, my instinct is that they won’t fix a 2019 problem such as this unless it were impacted a number of players. They might for the 2020 CX line, and perhaps for whatever they announce next week at CES. 

 

Hope my initial tests prove reliable and repeatable over the next few days!

 

Thanks for info. Question: can you still output 5.1 LPCM from Apple TV (or another device, such as PS5)? I thought that Apple TV needed to be hooked up to the Arcana for the 5.1 LPCM to work with Sonos Arc and Arcana. 

I think I found the solution.  The player and the Sonos app are showing 2 channel, but I’m getting surround.  Try it and let me know your thoughts.

My set up:

TV: LG C9 

Player: Panasonic UB820

Sonos: Arc, Gen 3 Sub, One SL x 2

 

Audio settings on the UB820

Digital Audio Output - DTS: PCM

Downmix: Surround Encoded

 

Audio Settings on LGC9

HDMI ARC

Digital Sound: Passthrough 

eARC: On

 

 

I was playing around with some settings today and I found another way to get sound from all speakers.

 

I think the difference this time is that I actually ran the device connector for the HDMI inputs so that my HDMI2 was set to Sonos (by selecting the sound bar manufacturer), and my HDMI 3 was set to Panasonic (by selecting the Blu-ray player manufacturer)

 

The result in the Sonos App System Info still says stereo PCM 2.0, but I’m achieving sound from all my speakers.  Previously the only way i was able to achieve sound from all speakers was by setting the Audio Downmix in the UB820 to Surround Encoded.  Beyond that every other possible combination of settings would not result in audio coming from all of my speakers.  I believe the Device Connector did something.  

 

Now I’m not sure if this is true 5.1 or if there is some virtual surround stuff going on here.  Would anybody with an HD fury set up compare what they are hearing by using my method, and then comparing to the HD Fury set up.

 

TV: LG C9 

Player: Panasonic UB820

Sonos: Arc, Gen 3 Sub, One SL x 2

 

Audio settings on the UB820

Digital Audio Output - DTS: Bitstream

Downmix: Stereo

 

Audio Settings on LGC9

HDMI ARC

Digital Sound: PCM or Passthrough

eARC: On

Userlevel 7

@zad What specific content are you testing?

The easiest way of knowing if you are getting 5.1 audio is listening to the dialogue. It should only be coming from the Arc speakers and not your surround speakers (unless there is a character speaking off of the screen). And when you hear 5.1 audio compared to 2.0 stereo, it will be a dramatic difference.

@GuitarSuperstar I’m testing out Blu-ray’s with DTS / DTS-MA soundtracks.  From what I’m hearing, dialogue is coming from the arc with the surrounds giving me distinct effects.  

Fake surround is OK, but it's not really the experience that I was expecting from this system. I'm just waiting to get my hands on a Xbox One X, and the Panasonic will go up for sale. It's a fine player but it doesn't work with my system.  And nobody seems to be listening at customer support, we haven't seen a firmware upgrade in 2 years, I don't suspect we'll ever see one.

 

 

Hmm i have a Xbox series X and UB820. I certainly wouldn’t be jumping ship to play my movies on the xbox. Have you looked at any of the comparison videos from the likes of John Archer? The UB820 is still one of the best 4K players on the market and there is a considerable difference in image quality over something like an xbox/PS5.

 

The XSX also can’t and unlikely will be able to play dolby vision from 4K disks for some reason. Which is strange considering that they are moving towards dolby vision being used in games.

 

Yeah I'm aware of the visual downgrade, but I'm willing to accept that for proper surround. I've got a pretty massive blu ray collection (nearly 1500 disc's) and I'd like to be able to take advantage of the surround track. I wasn't aware of the lack of dolby vision, but I've really only got a few 4k dolby vision disc's anyways.  The Xbox will certainly be a bandaid until something comes along that checks off all the buttons. Or Sonos starts to support DTS... Whatever comes first. 

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Does the audio sound just as good as playing a Dolby TrueHD Blu-ray? If you are getting actual multichannel PCM, it should sound just as good and immersive.

@GuitarSuperstar After some further testing..

 

I’m using the One Upon A Time In Hollywood 4K Blu Ray since it’s main audio track is DTS-MA, and all other languages are in DD 5.1

 

The DD tracks (Passthrough or Auto to the Arc) show up as DD 5.1 in the Sonos App, and give me clearly distinct sounds from each channel.

 

The DTS-MA track (PCM to the Arm) the audio volume is noticeably lower, and the sounds are not nearly as distinct.  

 

So I’m exactly sure what this all boils down to.  All i know is by using the device connector and setting the inputs to the proper device / brand I’m able to get some kind of surround.  That wasn’t happening before at all.  (unless i set the BluRay audio downmix to Surround Encoded) 

 

 

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@zad Unfortunately, it sounds like you are just getting Stereo PCM 2.0 with the same audio playing through your surrounds. The fact that the DD 5.1 track sounds better than the DTS-MA (or converted PCM 5.1) audio track is very telling.

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