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esspydermonkey
Contributor I
June 12, 2020
Answered

LPCM ETA for Arc?

LG has released a firmware upgrade for the B9/C9/E9 supporting multichannel PCM passthrough.  This is great except Arc doesn’t support it yet.


Because of this new update, my Apple TV decides it should use LPCM instead of Dolby Digital 5.1 with Atmos enabled resulting in only 2.0 audio for non Atmos content.  The current only workaround is to disable Atmos and enable it when you want to watch an Atmos file.  Very frustrating as the previous firmware had no issue.

 

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    Ditte
    DitteAnswer
    November 10, 2020

    Hi all,

    We hear you. With a software update today, Arc now supports multi-channel LPCM, bringing new immersive sound experiences for gaming, Blu-ray discs, and more. To get support for multi-channel LPCM on Arc, download the latest Sonos S2 update from the app store and then update your system in the Sonos S2 app. After updating the app, go to Settings > System > System Updates > Check for Updates.

    All the best,

    Ditte

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    Outburst
    Enthusiast II
    November 11, 2020

    I doubt that you get Atmos when you have set all output to Multichannel PCM. Multichannel PCM 7.1 is not Atmos (5.1.2), but the classic 7.1 layout.

    Naekyr
    Enthusiast II
    November 11, 2020

    I doubt that you get Atmos when you have set all output to Multichannel PCM. Multichannel PCM 7.1 is not Atmos (5.1.2), but the classic 7.1 layout.


    Ive tested Atmos sound using Netflix app on the TV and matching movie with Atmos output and Sonos app shows Atmos input. The overhead affects are still quiet due to my high ceiling.

    for the PC, I'm using an app called Dolby Atmos Access for Home Theatre, it encodes PC sound output into Atmos 

     

    SONOS ARC | SONOS Sub | SONOS Play 1 x 2 | LG C9 OLED | PS5 | RTX3090 Gaming PC | Sennheiser GSP600 Headset | Audio Pro T8L Desktop Monitors
    ledzep1
    Headliner II
    November 11, 2020

    Good news , thanks Sonos.

     

    I have a question, I have my oppo203 set to bitstream, previously when I watched a bluray with DTS it would output as stereo 2.0.

    Does this update mean that instead I will get something else other than stereo 2.0?

     

    Or do I need to change a setting still on my oppo203.

     

    Thanks.

     

    On a side note does this update contain any other fixes?

    Outburst
    Enthusiast II
    November 11, 2020

    I doubt that you get Atmos when you have set all output to Multichannel PCM. Multichannel PCM 7.1 is not Atmos (5.1.2), but the classic 7.1 layout.


    Ive tested Atmos sound using Netflix app on the TV and matching movie with Atmos output and Sonos app shows Atmos input. The overhead affects are still quiet due to my high ceiling.

    for the PC, I'm using an app called Dolby Atmos Access for Home Theatre, it encodes PC sound output into Atmos 

     

     

    Ah ok, I have misunderstood you then. I thought you are only putting out Multichannel PCM. For the height effects I also had to tinker around a bit to find the sweet spot. This video helped me a lot: 

     

    I would also advise to use Atmos demo video when you want to calibrate your system, because they have usually more audible height channels.

    Naekyr
    Enthusiast II
    November 11, 2020

    I doubt that you get Atmos when you have set all output to Multichannel PCM. Multichannel PCM 7.1 is not Atmos (5.1.2), but the classic 7.1 layout.


    Ive tested Atmos sound using Netflix app on the TV and matching movie with Atmos output and Sonos app shows Atmos input. The overhead affects are still quiet due to my high ceiling.

    for the PC, I'm using an app called Dolby Atmos Access for Home Theatre, it encodes PC sound output into Atmos 

     

     

    Ah ok, I have misunderstood you then. I thought you are only putting out Multichannel PCM. For the height effects I also had to tinker around a bit to find the sweet spot. This video helped me a lot: 

     

    I would also advise to use Atmos demo video when you want to calibrate your system, because they have usually more audible height channels.

     

    Thanks that video is very helpful, I will change the placement slightly and retune it

    SONOS ARC | SONOS Sub | SONOS Play 1 x 2 | LG C9 OLED | PS5 | RTX3090 Gaming PC | Sennheiser GSP600 Headset | Audio Pro T8L Desktop Monitors
    Lekaa
    Lyricist III
    November 11, 2020

    Thanks Sonos!

    A question,

    Should I go with dts to eac3 transcode or run multi channel 7.1, which is better?

    I do have multichannel pcm 7.1 now 🙃

    DonAlexei
    Contributor I
    November 13, 2020

    So If I insert a DTS Blu-ray and set my player to pcm/lpcm my rears will work?

    GuitarSuperstar
    Lead Maestro
    November 13, 2020

    So If I insert a DTS Blu-ray and set my player to pcm/lpcm my rears will work?

    Not only will your rear surround speakers work, but you should also be hearing more audio separation from the Arc because you are going from stereo 2.0 to LPCM 5.1.

    "Receive with simplicity everything that happens to you." - Rashi
    Lalligator
    Lyricist III
    November 13, 2020

    Thanks Sonos!

    A question,

    Should I go with dts to eac3 transcode or run multi channel 7.1, which is better?

    I do have multichannel pcm 7.1 now 🙃

    Pcm, as otherwise you are converting from one lossy format to another.

    DonAlexei
    Contributor I
    November 13, 2020

    So If I insert a DTS Blu-ray and set my player to pcm/lpcm my rears will work?

    Not only will your rear surround speakers work, but you should also be hearing more audio separation from the Arc because you are going from stereo 2.0 to LPCM 5.1.

    I have hooked an Sony x800 blu-ray player to a Samsung Q90t tv with e-arc. Set the player to pcm. Tried the TV set to pcm and passthrough and the Sonos app only said stereo pcm 2.0. What do I need to change 😭

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