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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M

MJW75

Enthusiast I

It seemed to just happen once a week or so, usually when starting to play something (maybe the audio mode switching can cause it?). It doesn’t seem to be 5.1 related, it can happen on anything. Sometimes no sound, sometimes only some audio channels play. A quick restart fixes it. I never had any image issues though.

Y

yofalat611

Enthusiast I

From reviews/anecdotes, it seemed like optical cables are more prone to failure (and the longer, the more problematic) so I ended up not getting one. Maybe that’s why we’re only getting these reports months (year?) later.

Perhaps our only hope is if the rumored Arc successor has the same issue lol. But by then I would’ve replaced and demoted my Beam already so I wouldn’t care anymore.

A

Anonymous

Hi all, I have a LG C2 and I bought a beam 2 a few weeks back but I had not played my PS5 until today and yep I’ve got this issue 🙄 I’ve had more problems with the Beam 2 than the Beam 1. Some ‘upgrade’.

I have PS5 in HDMI 3. I have Apple TV in HDMI 4 and have had zero skipping issues with that.

Whoever is at fault, be it LG or Sonos needs to fix this crap. It’s a joke that the solution is to buy a new cable. I’ve just bought the one linked on this page so hopefully that works with no problems.

M

MJW75

Enthusiast I

Hi all, I have a LG C2 and I bought a beam 2 a few weeks back but I had not played my PS5 until today and yep I’ve got this issue 🙄 I’ve had more problems with the Beam 2 than the Beam 1. Some ‘upgrade’.

On the PS5 you can switch on Atmos and it will no longer be a problem (Settings > Sounds > Audio Output > Audio Format). I’ve never had this issues since changing the settings. My PS5 is also on HDMI 3.

A

Anonymous

Hi all, I have a LG C2 and I bought a beam 2 a few weeks back but I had not played my PS5 until today and yep I’ve got this issue 🙄 I’ve had more problems with the Beam 2 than the Beam 1. Some ‘upgrade’.

On the PS5 you can switch on Atmos and it will no longer be a problem (Settings > Sounds > Audio Output > Audio Format). I’ve never had this issues since changing the settings. My PS5 is also on HDMI 3.

Thanks. But can I ask why is Linear PCM recommand for PS5 then and not Dolby atmos? Why was everyone in the thread not just switching over? What I’m I losing by switching to atmos? I presume I still get 5.1

Sorry for all the questions but I am a audio noob :D

M

MJW75

Enthusiast I

Hi all, I have a LG C2 and I bought a beam 2 a few weeks back but I had not played my PS5 until today and yep I’ve got this issue 🙄 I’ve had more problems with the Beam 2 than the Beam 1. Some ‘upgrade’.

On the PS5 you can switch on Atmos and it will no longer be a problem (Settings > Sounds > Audio Output > Audio Format). I’ve never had this issues since changing the settings. My PS5 is also on HDMI 3.

Thanks. But can I ask why is Linear PCM recommand for PS5 then and not Dolby atmos? Why was everyone in the thread not just switching over? What I’m I losing by switching to atmos? I presume I still get 5.1

Sorry for all the questions but I am a audio noob :D

Atmos was added to the PS5 last year in an update. Most of this thread predates that change.

A

Anonymous

Hi all, I have a LG C2 and I bought a beam 2 a few weeks back but I had not played my PS5 until today and yep I’ve got this issue 🙄 I’ve had more problems with the Beam 2 than the Beam 1. Some ‘upgrade’.

On the PS5 you can switch on Atmos and it will no longer be a problem (Settings > Sounds > Audio Output > Audio Format). I’ve never had this issues since changing the settings. My PS5 is also on HDMI 3.

Thanks. But can I ask why is Linear PCM recommand for PS5 then and not Dolby atmos? Why was everyone in the thread not just switching over? What I’m I losing by switching to atmos? I presume I still get 5.1

Sorry for all the questions but I am a audio noob :D

Atmos was added to the PS5 last year in an update. Most of this thread predates that change.

Now I’m bought the cable I’ll try that first. I see from your posts that can cause it’s own (perhaps rare?) problem?

M

MJW75

Enthusiast I

It can, but it is a whole lot better than without it.

A

Anonymous

It can, but it is a whole lot better than without it.

Last thing on this, atmos on PS5 doesn’t work with every game, right?

Fendera

Lyricist III

Hi all, I have a LG C2 and I bought a beam 2 a few weeks back but I had not played my PS5 until today and yep I’ve got this issue 🙄 I’ve had more problems with the Beam 2 than the Beam 1. Some ‘upgrade’.

On the PS5 you can switch on Atmos and it will no longer be a problem (Settings > Sounds > Audio Output > Audio Format). I’ve never had this issues since changing the settings. My PS5 is also on HDMI 3.

Thanks. But can I ask why is Linear PCM recommand for PS5 then and not Dolby atmos? Why was everyone in the thread not just switching over? What I’m I losing by switching to atmos? I presume I still get 5.1

Sorry for all the questions but I am a audio noob :D

There are certain games that don't support Dolby Atmos on PS5. You'll loose Surround or get wrong audio channels with some games. Most games are made with Linear PCM in mind.

Dolby Atmos can also be amazing for certain games. If you have issues with sound, switch back to Linear PCM. It varies game by game.

Here are certain examples that give you issues when using Dolby Atmos:

- The Last of Us Part 2

- God of War Ragnarok

- Stellar Blade (defaults to stereo when using Atmos)

I want to add that only HDMI 3 and 4 are affected by the sound cut out issue. HDMI 1 is totally fine and shouldn't have this issue.

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