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

Looks like no fix in 15.2, disappointing as I hoped this would be the one.

After 8 months, Sonos still don't know if it's even their bug...

Would be one thing if they can confidently proclaim it isn’t theirs. But to still be clueless after almost 9 months? Bravo. I’m not expecting anything from Sonos anymore. Just biding my time until the next upgrade.

Anyway HDMI1 still works for me and I turn off my power strip 2-3 times a week. I’ve only skimmed recent posts -- does a way one cable disable/downgrade HDMI-CEC? I’ve actually ran out of ports so I use an HDMI switcher on HDMI1 where I connect all devices that regularly use PCM 5.1. I guess that’s another option people may consider.

CEC still working. The only thing you seem to lose is the Sonos image when selecting HDMI 2 (which is pointless anyway).

P

PurpleBat

Lyricist II

Looks like no fix in 15.2, disappointing as I hoped this would be the one.

That is disappointing. At least my workaround is still working (see my previous posts if you haven’t already), so I’m happy enough that it will no longer cause me issues. I’ll still follow this for a proper fix though.

For anyone interested, this is a the cable I’m using which fixed the problem for me.
https://www.amazon.co.uk/dp/B09YPR5SD4

I ordered the cable. Should be delivered tomorrow. I will test it and report it here, if the dropouts are gone, too.

M

MJW75

Enthusiast I

Looks like no fix in 15.2, disappointing as I hoped this would be the one.

That is disappointing. At least my workaround is still working (see my previous posts if you haven’t already), so I’m happy enough that it will no longer cause me issues. I’ll still follow this for a proper fix though.

For anyone interested, this is a the cable I’m using which fixed the problem for me.
https://www.amazon.co.uk/dp/B09YPR5SD4

I ordered the cable. Should be delivered tomorrow. I will test it and report it here, if the dropouts are gone, too.

Make sure you run the cable with the TV at the source end. Fingers crossed this works for you too. I’ve been watching loads lately with 5.1 PCM and I’ve not had an issue.

V

vimto_boy

Lyricist II

Looks like no fix in 15.2, disappointing as I hoped this would be the one.

That is disappointing. At least my workaround is still working (see my previous posts if you haven’t already), so I’m happy enough that it will no longer cause me issues. I’ll still follow this for a proper fix though.

For anyone interested, this is a the cable I’m using which fixed the problem for me.
https://www.amazon.co.uk/dp/B09YPR5SD4

I ordered the cable. Should be delivered tomorrow. I will test it and report it here, if the dropouts are gone, too.

Make sure you run the cable with the TV at the source end. Fingers crossed this works for you too. I’ve been watching loads lately with 5.1 PCM and I’ve not had an issue.

I’ve only been set up with Beam 2, One SL surrounds, and LG G2 55 for a couple of weeks - I’m new to the Sonos ecosystem, and just bought the G2 - but the dropouts playing on Switch with surround on had been driving me nuts. Hadn’t noticed the issue with anything else (streaming content on native apps, gaming on Xbox Series S) and wasn’t sure how to troubleshoot between Switch, LG and Sonos.

I added a Panasonic 4K BD player this week, and noticed the dropouts immediately on non-Atmos content… also with PCM 5.1! Now I knew what to Google, it wasn’t just a Nintendo issue, and found this thread. Stayed up until 2am a couple of nights back reading the whole thing, with mounting dread at the lack of progress re. a proper fix… what a saga. However got to your input at the end (perfect timing!) and have the cable you linked due for delivery today. Massive kudos and thanks to you and everyone on this thread for all the troubleshooting you’ve been through, if I’d had 9 months of this I think I would have given up.

I’ll let you know how I get on once the cable arrives, fingers crossed!

P

PurpleBat

Lyricist II

The cable arrived today. After a first short test, I can say that the Nintendo Switch no longer has any dropouts. Will check the PS5 later today.
I'll report back here in a few days if everything is still running stable!

V

vimto_boy

Lyricist II

The cable arrived today. After a first short test, I can say that the Nintendo Switch no longer has any dropouts. Will check the PS5 later today.
I'll report back here in a few days if everything is still running stable!

Very positive news! Hope it continues to do the job. Amazon c*cked up my delivery, so still waiting on mine 🤞

M

mser

Lyricist II

Looks like no fix in 15.2, disappointing as I hoped this would be the one.

That is disappointing. At least my workaround is still working (see my previous posts if you haven’t already), so I’m happy enough that it will no longer cause me issues. I’ll still follow this for a proper fix though.

For anyone interested, this is a the cable I’m using which fixed the problem for me.
https://www.amazon.co.uk/dp/B09YPR5SD4

I ordered the cable. Should be delivered tomorrow. I will test it and report it here, if the dropouts are gone, too.

Make sure you run the cable with the TV at the source end. Fingers crossed this works for you too. I’ve been watching loads lately with 5.1 PCM and I’ve not had an issue.

Thank you very much for your testing and also thanks to @RANDUSR23296 for the extensive debugging work!

I’ve gone ahead and ordered said cable as well (from Amazon Germany) and will report back once I was able to test it.

A

Alsa

Lyricist II

I bought the cable from amazon singapore and will be testing as well.

K

kikeminchas

Lyricist III

Also bought the cable and waiting for it to be delivered. I am following this thread from the beginning but haven't had the patience to do the extensive testing and troubleshooting @RANDUSR23296 or @MJW75 have done. Many thanks for your efforts.

V

vimto_boy

Lyricist II

Replacement cable arrived today… further testing required, but played an hour of Switch with Surround on, and played 30 mins of a 5.1 Blu Ray that was problematic before… zero dropouts thus far!

Many thanks again to @MJW75 and @RANDUSR23296

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