Contributor I

Lost surround and sub ( after update ?)

Forum|Forum|4 years ago
April 23, 2022
1604 replies
81295 views

Hi

I don’t know if my issue is related to the 14.6 update but I noticed today that I had no sound from my surround (play 3) and my sub (Gen 2), only the Arc is working They are still present in the app under the my System view but now sound which every sources

When I reboot each of them, the sound comes back temporary, but when I switch to another source or audio format, thé Sound disappears again. Tried several times, same behavior

Thanks for your help

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G

GuitarSuperstar

Lead Maestro

Just curious, I know we’re experiencing this issue across many source devices but among those experiencing it, who doesn’t have an Apple TV at all? If not what devices do you have?

I have an Apple TV 4K, but I experienced the delay from the surrounds watching a YouTube video on a Roku Ultra and experienced the Sub and surrounds dropping out using a Panasonic UB820 Blu-ray player.

"Receive with simplicity everything that happens to you." - Rashi

N

Nylon

Enthusiast I

Just an FYI for Apple TV users. The best way to avoid sound loss seems to be to change the Apple TV audio out setting from ‘auto’ to ‘Dolby 5.1’. This means all audio output is transcoded to Dolby 5.1 and this seems to stabilize the audio output with Sonos speakers connected via HDMI ARC/eARC. Speculatively, there seems to be something going on whereby audio codec changes seem to be causing issues. This can manifest by changing sources i.e from Cable Box to Apple TV etc. or even within Youtube (in my case) where different videos are encoded with various codecs etc.

This doesn’t track.

I have a 2nd gen ATV 4K, which functionally decodes everything (except Atmos) to LPCM 5.1. It doesn’t deliver bitstream the TV/Arc at all in ‘auto’ mode. My PS5 does the same thing (LPCM 5.1 only). I am still seeing drop/sync issues, with all devices ONLY outputting LCPM 5.1.

Effectively, changing my Apple TV to force DD5.1 encoding would actually CAUSE me to be switching codecs when I change devices, not prevent it. Like I said, I’m still seeing the issue.

Also fwiw, YouTube audio is always decoded to LPCM by your player, as it’s encoded in either Opus or AAC format. The Arc (and basically all soundbars and HT receivers) don’t support either format bitstreamed so it needs to be LPCM. Basically, playing YouTube videos won’t ever change the audio codec streamed from the player (always decoded LPCM).

As I said it’s speculative. I have a 1st gen Apple TV 4K and having audio set to 5.1 output instead of Auto results in no drops for me while navigating the various apps including Youtube on the Apple TV. I’m not sure if the newer model handles audio differently. However, I have an older Sony TV with the older HDMI ARC standard not the newer eARC. Honestly, there are so many variables. Have you tried setting it to 5.1. If you have a newer eARC TV then doing so would result in an audio downgrade I assume. Either way the problem is clearly with Sonos’ update from a little more than a fortnight ago. Never had any issues prior to that.

F

Freddy45764

Enthusiast II

Just curious, I know we’re experiencing this issue across many source devices but among those experiencing it, who doesn’t have an Apple TV at all? If not what devices do you have?

I have an Apple TV 4K, but I experienced the delay from the surrounds watching a YouTube video on a Roku Ultra and experienced the Sub and surrounds dropping out using a Panasonic UB820 Blu-ray player.

I agree, I see it on all my devices too, not just my Apple TV. Where I’m going is that I first saw the problem when I added a second Apple TV 4K to my setup. Then I ‘rebuilt’ my system and only plugged in a single Apple TV, no other sources and didn’t have a single dropout for a week. Then I plugged in the second Apple TV but didn’t really use it and went another week without a dropout. Then I watched some content on the second Apple TV (after two stable weeks) and re-triggered the issue and have been experiencing dropouts for a couple days since. Going to ‘rebuild’ again and leave only one Apple TV and no other source device connected and see if I stabilize again. Just trying to isolate what source devices might be connected to people’s systems to see if there are any commonalities.

R

RBSnake

Lyricist III

I don’t have an Apple TV at all, just an Nvidia Shield and using the built in LGCX apps, still getting the same sound drop outs as the ATV users.

B

ban25

Enthusiast I

Just curious, I know we’re experiencing this issue across many source devices but among those experiencing it, who doesn’t have an Apple TV at all? If not what devices do you have?

I have an NVIDIA Shield Pro (2019) and I have been experiencing dropouts on my subs and surrounds since 14.6 was introduced. I don't own an Apple TV. I have an Arc, 2x Sub (Gen 3), and 2x Fives for my home theater setup. Very frustrating as it is almost unusable in this state. :(

F

Freddy45764

Enthusiast II

Just curious, I know we’re experiencing this issue across many source devices but among those experiencing it, who doesn’t have an Apple TV at all? If not what devices do you have?

I have an NVIDIA Shield Pro (2019) and I have been experiencing dropouts on my subs and surrounds since 14.6 was introduced. I don't own an Apple TV. I have an Arc, 2x Sub (Gen 3), and 2x Fives for my home theater setup. Very frustrating as it is almost unusable in this state. :(

I’m becoming more convinced this is related to Dolby Mat format. Nvidia shield and Apple TV 4K both use this format for some Dolby content. Found this on a Nakamichi (atmos soundbar manufacturer) support page related to nvidia shield:

Dolby Atmos MAT audio playback:

Some content devices output Dolby Atmos audio in "Dolby Atmos MAT" format, a new audio format that adds Dolby Atmos metadata into lossless pulse-code modulation (PCM) audio. The content devices are designed to prioritize internal buffering for high quality video when playing Dolby Atmos MAT contents. Therefore, the buffering process might cause random audio cut-outs. This is reported by various users with content devices that outputting Dolby Atmos MAT format

Sure sounds familiar to me

B

ban25

Enthusiast I

Just curious, I know we’re experiencing this issue across many source devices but among those experiencing it, who doesn’t have an Apple TV at all? If not what devices do you have?

I have an NVIDIA Shield Pro (2019) and I have been experiencing dropouts on my subs and surrounds since 14.6 was introduced. I don't own an Apple TV. I have an Arc, 2x Sub (Gen 3), and 2x Fives for my home theater setup. Very frustrating as it is almost unusable in this state. :(

I’m becoming more convinced this is related to Dolby Mat format. Nvidia shield and Apple TV 4K both use this format for some Dolby content. Found this on a Nakamichi (atmos soundbar manufacturer) support page related to nvidia shield:

Dolby Atmos MAT audio playback:

Some content devices output Dolby Atmos audio in "Dolby Atmos MAT" format, a new audio format that adds Dolby Atmos metadata into lossless pulse-code modulation (PCM) audio. The content devices are designed to prioritize internal buffering for high quality video when playing Dolby Atmos MAT contents. Therefore, the buffering process might cause random audio cut-outs. This is reported by various users with content devices that outputting Dolby Atmos MAT format

Sure sounds familiar to me

Suspicious since the issue only began happening with 14.6 and the behavior starts with the sub and surrounds getting out of sync before dropping out fully. In my case, this produces a nasty echo. The Arc itself never stops outputting sound.

F

Freddy45764

Enthusiast II

Just curious, I know we’re experiencing this issue across many source devices but among those experiencing it, who doesn’t have an Apple TV at all? If not what devices do you have?

I have an NVIDIA Shield Pro (2019) and I have been experiencing dropouts on my subs and surrounds since 14.6 was introduced. I don't own an Apple TV. I have an Arc, 2x Sub (Gen 3), and 2x Fives for my home theater setup. Very frustrating as it is almost unusable in this state. :(

I’m becoming more convinced this is related to Dolby Mat format. Nvidia shield and Apple TV 4K both use this format for some Dolby content. Found this on a Nakamichi (atmos soundbar manufacturer) support page related to nvidia shield:

Dolby Atmos MAT audio playback:

Some content devices output Dolby Atmos audio in "Dolby Atmos MAT" format, a new audio format that adds Dolby Atmos metadata into lossless pulse-code modulation (PCM) audio. The content devices are designed to prioritize internal buffering for high quality video when playing Dolby Atmos MAT contents. Therefore, the buffering process might cause random audio cut-outs. This is reported by various users with content devices that outputting Dolby Atmos MAT format

Sure sounds familiar to me

Suspicious since the issue only began happening with 14.6 and the behavior starts with the sub and surrounds getting out of sync before dropping out fully. In my case, this produces a nasty echo. The Arc itself never stops outputting sound.

To be clear, I’m not suggesting this wasn’t introduced by 14.6. Just that it could be related to how Sonos devices interact with Dolby Mat devices. I haven’t experienced the out of sync issue myself yet, just dropouts in varying combinations of the sub and 2 surround channels.

B

ban25

Enthusiast I

Just curious, I know we’re experiencing this issue across many source devices but among those experiencing it, who doesn’t have an Apple TV at all? If not what devices do you have?

I have an NVIDIA Shield Pro (2019) and I have been experiencing dropouts on my subs and surrounds since 14.6 was introduced. I don't own an Apple TV. I have an Arc, 2x Sub (Gen 3), and 2x Fives for my home theater setup. Very frustrating as it is almost unusable in this state. :(

I’m becoming more convinced this is related to Dolby Mat format. Nvidia shield and Apple TV 4K both use this format for some Dolby content. Found this on a Nakamichi (atmos soundbar manufacturer) support page related to nvidia shield:

Dolby Atmos MAT audio playback:

Some content devices output Dolby Atmos audio in "Dolby Atmos MAT" format, a new audio format that adds Dolby Atmos metadata into lossless pulse-code modulation (PCM) audio. The content devices are designed to prioritize internal buffering for high quality video when playing Dolby Atmos MAT contents. Therefore, the buffering process might cause random audio cut-outs. This is reported by various users with content devices that outputting Dolby Atmos MAT format

Sure sounds familiar to me

Suspicious since the issue only began happening with 14.6 and the behavior starts with the sub and surrounds getting out of sync before dropping out fully. In my case, this produces a nasty echo. The Arc itself never stops outputting sound.

To be clear, I’m not suggesting this wasn’t introduced by 14.6. Just that it could be related to how Sonos devices interact with Dolby Mat devices. I haven’t experienced the out of sync issue myself yet, just dropouts in varying combinations of the sub and 2 surround channels.

Gotcha. I just confirmed the issue is still happening after the update to 14.6.1. I tried watching Thunderball with DTS 5.1 and the surrounds desynched (by roughly 250ms) after 10 minutes.

mejustowen

Trending Lyricist I

It is absolutely ridiculous that this has gone on as long as it has with no public acknowledgment from Sonos. How much longer is this gonna persist? A week? A month? A year? So disappointing.

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