Sonos Staff

Please read if you have encountered issues with 7.1 LPCM playback on Sonos via an LG TV

75 replies
11342 views

Hi,

We want to gather some details from people experiencing issues with playback of 7.1 LPCM audio streams on a Sonos Arc or Beam (Generation 2), via an LG television set. Specifically, when channels are playing from the wrong speakers - for example, but not limited to, if you hear dialogue only coming from the rear speakers, consistently.

If you have experienced this channel mis-mapping, please provide, in this thread, the following details:

Your LG TV model number

Your media source device name and model number or TV app that the issue was noticed on, and the name of the movie/show that was affected

Models of any other HDMI devices connected to the TV (if applicable)

The confirmation number of a Sonos system diagnostic submitted while the affected media was playing and 7.1 LPCM was reported in the Sonos app.

Thank you for your assistance.

This topic has been closed for further comments. You can use the search bar to find a similar topic, or create a new one by clicking Create Topic at the top of the page.

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S

ste_ms

Enthusiast I

It’s definitely 6 CH, just checked;

GENERAL

HDMI3, HPD: HIGH, 5V : HIGH, R×Sense : HIGH 3840×2160P @ 23.97Hz RGB 8BIT NODATA PCM 6Ch 48000HZ

HDMI Mode : HDMI, HDR Type : SDR

Than you both very much! This has plagued me for so long now that I’m willing to spend the money and just buy a new Apple TV…

Just beware of the sound drops with 5.1 signals if you have a beam

B

bernd_brot

Lyricist II

It’s definitely 6 CH, just checked;

GENERAL

HDMI3, HPD: HIGH, 5V : HIGH, R×Sense : HIGH 3840×2160P @ 23.97Hz RGB 8BIT NODATA PCM 6Ch 48000HZ

HDMI Mode : HDMI, HDR Type : SDR

Than you both very much! This has plagued me for so long now that I’m willing to spend the money and just buy a new Apple TV…

Just beware of the sound drops with 5.1 signals if you have a beam

Thanks for the heads up, we have a Sonos Arc 5.1 Setup, I hope everything will be fine!

L

ledzep1

Headliner II

It’s definitely 6 CH, just checked;

GENERAL

HDMI3, HPD: HIGH, 5V : HIGH, R×Sense : HIGH 3840×2160P @ 23.97Hz RGB 8BIT NODATA PCM 6Ch 48000HZ

HDMI Mode : HDMI, HDR Type : SDR

Than you both very much! This has plagued me for so long now that I’m willing to spend the money and just buy a new Apple TV…

Hi

May are ask what your issue was?

I have multichannel pcm 7.1 via my 2021 Apple TV as well, but never found it to be an issue, I do get multichannel pcm 5.1 via my PS5, so it seems to be device dependent.

Do you just want a new 2022 Apple TV so it displays 5.1 correctly or is there an actual sound issue?

I thought this one got put to bed a while ago and there was any sound issues as such.

S

slongChez

Trending Lyricist I

It’s definitely 6 CH, just checked;

GENERAL

HDMI3, HPD: HIGH, 5V : HIGH, R×Sense : HIGH 3840×2160P @ 23.97Hz RGB 8BIT NODATA PCM 6Ch 48000HZ

HDMI Mode : HDMI, HDR Type : SDR

Than you both very much! This has plagued me for so long now that I’m willing to spend the money and just buy a new Apple TV…

Just beware of the sound drops with 5.1 signals if you have a beam

Thanks for the heads up, we have a Sonos Arc 5.1 Setup, I hope everything will be fine!

Did you end up upgrading after all?

A

ajdz859

Lyricist I

I experience this. I'm also in a beta software test now so this is cross-posted there.

1. Watching a series of episodes (Netflix and Amazon prime video, sometimes the audio for a new episode plays from wrong channel. Dialog from rear right, back left has background music, arc sound bar has traditionally surround audio.
2. Stopping episode and then resuming fixes the mix
3.
4.

Tell us what happened:
tv model LG OLED65C2AUA
Watching via apple tv 4k
Sonos arc connected via eARC
Experienced watching episodes of "I think you should leave" on Netflix and "Oh Cook!" On Amazon.

Corry PAuthor

Sonos Staff

Hi @ajdz859

Not only is Beta software irrelevant to any discussions here on the forum, it is also against the forum rules. Please don’t discuss Beta experiences here.

It’s clearly not something you want happening, however, so I recommend you feed this back to the Beta team - though it sounds like you have already. Thanks.

"Common sense is the collection of prejudices acquired by age eighteen." - Albert Einstein

A

ajdz859

Lyricist I

@Corry P your response is confusing and frankly, unnecessarily dismissive of the relevant topic of THIS thread. Are you suggesting that the LG TV issue is resolved? Your initial feedback point is well taken, but overlooks that I have pointed out that I'm experiencing the sound channel mapping issue which is on topic for this thread.

Corry PAuthor

Sonos Staff

Hi @ajdz859

I created this topic over a year ago to determine once and for all whether anyone was experiencing channel mis-mapping or not, as there had been some inconclusive chat at the time. No-one reported having the issue at the time, and as with all discussions here on the community forum, it was in reference to the mainline software version only. It seems there was no such issue, so there was nothing to resolve.

However, your mention of Beta was a red flag - not only is all discussion of Beta banned from this forum, it being a direct contravention of the agreement you made when signing up to the Beta programme, but you are using software that essentially wasn’t asked about - Beta software is expected to be different. So, while your subject may seem on-topic for this thread, the fact that you are using Beta software makes you off-topic for this entire site, which overrules you being on-topic for this thread.

I do realise I came in rather heavy-handed in replying to you, but I stand by my wanting to immediately emphasise that discussion of Beta is not permitted here. So, apologies for any offense taken at my tone, but I was trying to protect you from being censored and possibly barred from the site - depending on what you said next.

I hope this clears it up.

"Common sense is the collection of prejudices acquired by age eighteen." - Albert Einstein

M

Manchovy

Contributor I

Hi, fairly new to the Sonos experience here. I have an issue similar to what you mention. Channels occasionally swap, often center channel swaps to rear. Sometimes no sound at all. This usually occurs when a new signal is “introduced” - if I change TV channel, change Netflix or Hulu programs or even sometimes when a commercial pops on. It’s resolvable by backing out of whatever I’m watching, switching to something else, then going back. I’d say this happens 20-25% of the time, which doesn’t sound like a lot, but it’s pretty annoying.
Anyway, here’s my setup:

LG G2 65”

AppleTV 4K

Sonos Arc, Sub, 2 surrounds.

thanks,

Dave

Airgetlam

Unfortunately, that data you’ve provided doesn’t really help track the issue. What you should do is submit a system diagnostic within 10 minutes of experiencing this problem, and call Sonos Support to discuss it.

There may be information included in the diagnostic that will help Sonos pinpoint the issue and help you find a solution.

When you speak directly to the phone folks, they have tools at their disposal that will allow them to give you advice specific to your Sonos system and network.

Bruce

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