Trending Lyricist I

Multichannel PCM 5.1 dropping out since 14.10 update

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Anyone else experiencing the same issue? Multichannel PCM 5.1 blanks out for a second every 1-2 minutes. I don’t think it’s a bandwidth issue as it works flawlessly with Multichannel PCM 7.1 (thorough test) and Dolby TrueHD Atmos (quick test). And it may have been caused by the Sonos 14.10 update. Setup is PS5→ LG C1→ Beam 2 (via earc).

2 weeks ago before the 14.10 update, I watched a bluray film wherein I had my PS5 transcode the DTS-HD MA 5.1 audio to Multichannel PCM 5.1 (as the C1 does not support DTS) and had no issues. Earlier today, I played a bluray film for the first time in 2 weeks and I encountered consistent audio dropouts every 1-2 minutes. It had the same setup where DTS-HD MA 5.1 → Multichannel PCM 5.1. I tested other bluray discs including the one I watched 2 weeks ago and they all now have the same issue.

Curiously, I’ve been gaming heavily on my PS5 the past two 2 weeks and haven’t had any audio issues. Then I realized that I’ve been using Multichannel PCM 7.1 when gaming on my PS5. So I made some changes under the PS5 sound settings to make it output Multichannel PCM 5.1 instead. Lo and behold, I am now getting the same consistent dropouts in games and even on the PS5 main menu.

I think it’s due to the Sonos 14.10 update as that’s the only firmware update I’ve done in the last 2 weeks. No PS5 update, no LG C1 update. Well actually while I was composing this post, I received and applied the latest LG C1 firmware update and I still have the same issue.

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Pinned Reply By Corry P

Hi @throwawaybeam2 et al

We now recommend you reach out to the TV manufacturer (LG) as this behaviour is also occurring with different soundbar manufacturers (so it’s not a Sonos-specific issue).

Alternatively, please utilize different audio formats from McLPCM 5.1 (e.g., McLPCM 7.1, DD+, etc).

I hope this helps.

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samjhathaway

Trending Lyricist I

On the main page I go to param of (input/ouput)

And I got settings screen:

Was really hoping this would work, and initially the first try did work. Tried it again today and back to no audio coming through. Has anyone had any success or identified a fix?

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Alsa

Lyricist II

This issue is so widespread on sonos reddit and here that i cannot recommend buying sonos if u have a ps5 and lg tv. The bug has been around for 6 months. I too have this issue and none of the fixes will stop the dropouts.

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ste_ms

Enthusiast I

I also noticed a lot of discussions elsewhere. I have got another support call scheduled tomorrow and if I just get told to unplug and re plug again etc I’ll be tempted to try and get a refund under UK law. I had a playbar which was flawless but eARC has clearly been rushed and Sonos do not seem particularly bothered to try and use the resource of this community to resolve the issues

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ste_ms

Enthusiast I

Quick update, support call did not help, told it was a WiFi issue despite the beam being hardwired and the only Sonos product on my network. Was also told to do a factory reset but I’m reluctant to do that as Sonos seem to generally discourage that.

Can we please get some acknowledgement from a Sonos staff member to help escalate this as it is making my system unusable as most content is PCM 5.1.

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samjhathaway

Trending Lyricist I

It’s really bad and just makes our products unusable. Does anyone know if Sonos are looking at this issue a whole which may be fixed in upcoming updates? As it appears to be happening to a lot of people.

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kikeminchas

Lyricist III

@Corry P is at least aware of the issue (look at first page of this thread) but no idea if this is really actually being looked at by engineers. It seems that they won't check it out without factory resetting TV and Sonos. I cannot do that because I would lose trueplay and I don't have easy access to an iPhone. Others in the thread refused to factory reset for different reasons so I am afraid we are stuck, stupid really...

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RANDUSR23296

Enthusiast I

What I did on my LG C1

Remove my Sonos Beam from the external output as a sound bar
Reconfigure Sonos Beam as a sound bar (Sonos is not directly proposed by LG you have to enter the brand in the search bar)

My drop outs returned today, about 59 seconds apart. I tried the above steps, made no difference. Maybe we have similar but different problems.

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RANDUSR23296

Enthusiast I

@Corry P is at least aware of the issue (look at first page of this thread) but no idea if this is really actually being looked at by engineers.

I’m pretty sure this is not being looked at by Sonos given the chat conversation I’ve had with support

Quick update, support call did not help, told it was a WiFi issue despite the beam being hardwired and the only Sonos product on my network. Was also told to do a factory reset but I’m reluctant to do that as Sonos seem to generally discourage that.

It seems that they won't check it out without factory resetting TV and Sonos. I cannot do that because I would lose trueplay and I don't have easy access to an iPhone. Others in the thread refused to factory reset for different reasons so I am afraid we are stuck, stupid really...

Factory reset of the TV was originally requested in the thread which is much more inconvenient than resetting the Sonos, but I eventually did it and there was no change to the drop outs. Now my drop outs have returned I’ve also factory reset the Beam (which seems to be the new request from support). Now on Sonos 14.19 (LG still on 03.33.11), but the factory reset of the Beam did not resolve the drop outs, so I’ve submitted diagnostics 403846833 to capture.

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ste_ms

Enthusiast I

@Corry P any chance of another look at this? Every step seems to have been exhausted in terms of resetting and re plugging.

I have been through every option I can find trying to isolate a cause but nothing fixes it. I measure my dropouts about 40s apart but sometimes a bit longer, completely repeatable. I took this diagnostic after about 5 or 6 dropouts in a row. Would be happy to do any more tests with support if required, thanks.

Diagnostic 1814488426

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Fskies

Lyricist III

Hi guys, same here the issue is back ☹️

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