Contributor I

PS4 Pro outputting PCM via LG CX shows Multichannel PCM 7.1 for Sonos Arc, but rear surrounds have no audio

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I have the Arc, Sub, and Sonos 1 in a surround setup, connected to an LG CX via eArc. Previously I had the PS4 outputting Bitstream (Dolby), and Sonos reported Dolby Digital 5.1.

The fix that added LPCM to Sonos Arc recently went live, so I updated PS4 Pro to output PCM, and the HDMI input on the TV to PCM. (The output remained Passthrough). After doing this, the System Status page for Sonos shows Multichannel PCM 7.1.

However, I now get no rear surround audio in games like Assassin’s Creed Valhalla. (It’s not faint, there’s really none.) I get the full surround experience if I change it back to getting Dolby Digital 5.1. On the PS4 Home screen, I do get sound from the rears in PCM 7.1, albeit very faintly, compared to Dolby Digital 5.1.

Does Sonos not downmix the extra channels properly? It’s kinda bad that a higher fidelity signal sounds worse.

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Naekyr

Enthusiast II

Is this issue only with the LG CX?

Anything in DD 5.1 on apple4k tv is output as multichannel pcm 7.1

Blurays on my oppo203 in 5.1 output as 7.1

setting series x to uncompressed 5.1 outputs as multichannel pcm 7.1

Unsure if this topic relates to the same issue, can someone from Sonos please confirm, I have had this issue since the LPCM update you released, and it would be nice to know if it is indeed an issue with the Sonos?

Thank you

It's not your TV, the Arc needs a software update to handle downmixing properly

K

khaz22

Avid Contributor III

Is this issue only with the LG CX?

Anything in DD 5.1 on apple4k tv is output as multichannel pcm 7.1

Blurays on my oppo203 in 5.1 output as 7.1

setting series x to uncompressed 5.1 outputs as multichannel pcm 7.1

Unsure if this topic relates to the same issue, can someone from Sonos please confirm, I have had this issue since the LPCM update you released, and it would be nice to know if it is indeed an issue with the Sonos?

Thank you

You may have already been asked this, but I am curious if you have switched your TV to Auto rather than Passthrough? Until there is an update, this may allow the audio to be sent properly to the correct channels.

L

ledzep1

Headliner II

Is this issue only with the LG CX?

Anything in DD 5.1 on apple4k tv is output as multichannel pcm 7.1

Blurays on my oppo203 in 5.1 output as 7.1

setting series x to uncompressed 5.1 outputs as multichannel pcm 7.1

Unsure if this topic relates to the same issue, can someone from Sonos please confirm, I have had this issue since the LPCM update you released, and it would be nice to know if it is indeed an issue with the Sonos?

Thank you

You may have already been asked this, but I am curious if you have switched your TV to Auto rather than Passthrough? Until there is an update, this may allow the audio to be sent properly to the correct channels.

I use bitstream / passthrough for everything. Guess its wait and see if this update Sonos are working on will fix it. I know they were testing it a while back so hopefully it should be released soon.

B

billiejoe87

Chromatic Producer I

Is this issue only with the LG CX?

Anything in DD 5.1 on apple4k tv is output as multichannel pcm 7.1

Blurays on my oppo203 in 5.1 output as 7.1

setting series x to uncompressed 5.1 outputs as multichannel pcm 7.1

Unsure if this topic relates to the same issue, can someone from Sonos please confirm, I have had this issue since the LPCM update you released, and it would be nice to know if it is indeed an issue with the Sonos?

Thank you

Yes it is only with the LG BX/CX/GX from what I can tell.

My Sony A8H with eARC passes 5.1 PCM without any issues from the Apple TV, Nintendo Switch etc. My LG CX always had the 7.1 PCM issue.

Add it to the list of issues with the LG CX. Thankfully, generally LG end up patching their issues eventually even though they often break other things in the process.

For me, I’d rather not deal with the level of incompetence LG brings to such expensive products. They’ve always had issues with Sonos equipment in terms of dropouts, lip sync etc.

1 x Arc, 1 x Beam Gen 2, 1 x Amp, 2 x Sonos In Ceiling Speakers, 2 x Sub, 4 x Sonos Ones, 2 x Sonos Era 100, 5 x Symfonisk Lamp (Gen 2)

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ledzep1

Headliner II

Did the latest system update version 13.0 fix this issue , has anyone tried it yet?

I believe it’s helped with dropouts for some tv owners, I will be pretty disappointed to finally get an update system side and doesn’t fix this as well.

I

iBoyley

Trending Lyricist I

Did the latest system update version 13.0 fix this issue , has anyone tried it yet?

I believe it’s helped with dropouts for some tv owners, I will be pretty disappointed to finally get an update system side and doesn’t fix this as well.

Doesn’t fix this issue

L

ledzep1

Headliner II

Did the latest system update version 13.0 fix this issue , has anyone tried it yet?

I believe it’s helped with dropouts for some tv owners, I will be pretty disappointed to finally get an update system side and doesn’t fix this as well.

Doesn’t fix this issue

Shame, perhaps now we have version 13, minor fixes will come along soon.

V

Versato

Lyricist III

I got the latest Sonos update yesterday (version 13) and I am still experiencing the same issue where the sound is muffled when I set my Ps5 audio output to lpcm. I have a Ps5, lg cx , and Sonos arc + sub + two SL ones. I am setting my Ps5 to use bitstream Dolby for now. Also I would like to note that I am setting my Ps5 to 5.1 channels instead 7.1 as I am aware the Sonos arc supports 5.1.

L

ledzep1

Headliner II

Any news on this @ Sonos support team?

Thanks

L

ledzep1

Headliner II

2 weeks later and still no response from sonos support, just a simple update on the fix for this will do.

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