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studiomatthewbrooks
Contributor I
November 17, 2020

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

  • November 17, 2020
  • 344 replies
  • 32087 views

I’m running an LG C9 with a Panasonic UB820 Blu-ray player, Sonos Arc + Sub gen 3 + One SL surrounds. The lack of DTS support on the Arc has been frustrating for non Dolby encoded Blu-ray discs, so I have been eagerly awaiting the multichannel PCM update.

It’s finally arrived (thanks, Sonos!) and I tried playing a DTS encoded Blu-ray and… no dice. Still stereo PCM 2.0. Has anyone running a similar set-up managed to get 5.1 PCM output from the Arc?

The C9 supports eARC and multichannel PCM, I’m using 48gbps HDMI cables that support up to 8k60Hz, all of the devices are up to date, I have the C9 set to PCM with eArc enabled, DTS output set to PCM on the UB820… I’m really at a loss here. Any ideas or suggested settings?

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    344 replies

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    Surge
    Lyricist III
    January 21, 2021

    Anyone received any reply from Panasonic or (more preferably) LG on this that wasn’t just them denying it being a software issue or claiming it isn’t meant to be able to convert to multi channel PCM?

    If people could share what they wrote to LG and Panasonic, then others that would otherwise not bother writing their own emails might then at least do a copy-paste job to them? More emails might increase the odds of rectifying the issue.

    Scotty01
    Lyricist II
    January 22, 2021

    Hi all I've sent LG and Panasonic an email about the problem with a link to this topic. Can anybody confirm the the hd fury Dr hdmi 4k works? 

    Setup is LG c9

    Ubp 820

    Sonos arc

     

    Thanks for any help 😉

    Robboadam
    Trending Lyricist I
    January 22, 2021

    Just want to say this thread has been really useful to read, as I’m having the exact same problems.

    Spoke to LG about it and they said:

    Panasonic gave an even more abrupt ‘not our problem to solve’ response:
     

     

    Chetiya
    Lyricist III
    January 22, 2021

    Hi all I've sent LG and Panasonic an email about the problem with a link to this topic. Can anybody confirm the the hd fury Dr hdmi 4k works? 

    Setup is LG c9

    Ubp 820

    Sonos arc

     

    Thanks for any help 😉

    I’ve got a GX, arc, and ub820ebk and have ordered a dr hdmi 4k, which is cheaper than the Arcana. Will update this thread when I’ve tested it. 

      Laird M Malamed
      Enthusiast I
      January 26, 2021

      My HDFury DR HDMI 4K arrived today!

       

      Happily, as expected, the device works to address the issue between the 820-LG C9-Sonos Arc. I have set the unit to the 4K max mode EDID. “Green 1 – 4k60-444-600M-HDR-BT2020-3D-FULLAUDIO” - 820 is set to DTS → PCM and Dolby to pass through. All of the media I tested before (see earlier in this thread) played exactly the same way. Dolby Atmos passed through the LG with TrueHD to the Sonos Arc. DTS Master HD and DTSX both were converted to PCM. For 5.1/7.1, they show up on the Sonos as Multichannel PCM 7.1. 2.0 DTS shows as 2 Channel PCM.

       

      Picture is correct for Dolby Vision and HDR and looks great both for 4K native sources (Hobbit & Psycho) and upsampled 1080p and 1080i Blu-ray discs.

       

      So, for me, this $99 (+ shipping) unit handles the handshake issues for at least the C9. Hopefully someone will verify this also works on the CX models too. The Arcana seems to be overkill for the problem (and I will try to sell mine on eBay at some point). 

       

      I will do more experimenting when I have time on the weekend to see how other settings work.

       

      Laird 

        Scotty01
        Lyricist II
        January 26, 2021

        Great thanks for the update I'll order mine today then. 

        Chetiya
        Lyricist III
        January 26, 2021

        Thanks for confirming, mine hasn’t arrived yet but your update is reassuring! I’ll confirm it works for the GX when I get it.

          tsb4515
          Lyricist III
          January 26, 2021

          Thanks for confirming, mine hasn’t arrived yet but your update is reassuring! I’ll confirm it works for the GX when I get it.

          My current setup is the UB820-LG CX-Sonos Arc and I hope DR HDMI works for your GX! I will look into buying one if it does. I finally got my Sonos Arc last week and one of the main reasons was because of its ability to convert DTS into PCM 5.1/7.1. Pretty disappointing to know the UB820 and LG CX don’t get along well :( Currently I’m using an Xbox One X when it’s a DTS track Blu Ray but it would be nice to use just one Blu Ray Player!

          Robboadam
          Trending Lyricist I
          January 26, 2021

          Does anyone know whether the same solution works for other LG 9 versions, such as the B9? I’m having the same problem with the B9 - although I’m still not tempted by getting the HDFury, it’d be good to know it’s not restricted to just C9s.

          iBoyley
          Trending Lyricist I
          January 26, 2021

          Pretty sure this would be a fix across the board. Two members have confirmed this appears to be the resolution on both a CX and C9 so i don’t see why a B9 would be any different.

           

          I’m getting nowhere with LG/Panasonic support (panasonics is the worst - seem to just be ignoring that this is an issue) so have gone ahead myself and ordered a DR HDMI 4K. 

           

          I would be interested to find out if anybody with a non LG TV had this working. So an AG9 > UB820 > Sonos Arc setup or similar. We already know that the oppo units work fine with LG but for some reason panasonic setup creates an EDID issue

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