Dolby Atmos causing audio on Arc to "pop" then cuts out

  • 8 November 2021
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82 replies

L

i had ZERO problems with tvOS 14.  I also did not have an issue with 15.0.  Seems the problem started during the 15.1 push.

jamie_shaw
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I've reached out to Apple Support and have a call with a senior advisor this afternoon, so we’ll see what's happening.

Unfortunately, seems the Apple TV 4K has no downgrade method due to no DFU mode 😔 

C

New tvOS beta and a Sonos system update. Wonder if the issue will still occur later on.

jamie_shaw
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New tvOS beta and a Sonos system update. Wonder if the issue will still occur later on.

Worth a try.

Spoke to Apple yesterday, explained I only experience this issue with Atmos content on Apple TV; mentioned they didn't have a record of similar issues in their bug tracker but are going to escalate to engineering to get started.

Seemed to acknowledge that the Apple TV seems the, if not if, a contributing factor given the circumstances.

Will keep pulling this thread and see where it leads.

Might not hurt opening your own support cases to light a bit of a fire…

 

jamie_shaw
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Just tried this morning — left Shang-Chi on Disney+ running, and then moved onto Snowpiercer on Netflix.  No issues at all.  Both had dropouts in under 10 minutes previously.

The only changes I made in the last few days was upgrading Arc to 13.4, and rebooting everything.

My Apple TV is an awkward place to do a complete power down from the mains (as the initial troubleshooting step by the Apple CS rep), so I powerered everything off, and flicked the power switch at the wall that has the extension for all my AV devices in the Living Room.  Left it for 30 seconds, and powered everything back on.  Following the update to 13.4, I tried the “TV Setup” again option, incase it needed to announce it now supports DTS or something daft (Whatever this button actually does… 😅)

So maybe it was the Arc’s software after all…  Looking at the release notes, the Arc has had some minor revisions (13.3.x) over the last few week or so, and I have automatic updates turn on.  Maybe one of these introduced a bug for the Apple TV’s particular encoding of Atmos?

That said, I’m not actually in the room with the Arc at present, just keep popping in to see if the Arc has crapped out.  Might be that it’s cutting and fixing itself, and still an issue, but doesn’t feel that way…

Will have to check against actual Atmos content in situ.  Definitely worth a retest on your own devices though.

D

Just to add to this. 

I’ve experienced the audio issue with multiple apps (Netflix, HBO Max, Paramount+) only when Atmos is playing. 

TVOS: 15.1 Has happened with all TVOS 15 updates but even happened when i was running 14. 

Arc Software is the most recent 13.4

When watching through the TV apps no popping issues are present but I CAN notice a faint decrease in volume very quickly then it regains normal volume levels. It’s so faint that you can barley notice. Not sure if thats an issue with the TV or Arc but I eliminated the ATV all together so it seems there still an audio issue present. 

I also realized (as someone else mentioned) ATV only pushes Multichannel PCM instead of DD+. I’ve noticed that DD+ sounds better so I’ve been playing my content through the TV apps when available. Sucks that apple doesn't support DD+ (but thats another topic i guess).

 

W
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Could be the same issue as this, as it’s not just related to surrounds dropping out, but also reverb and distortions with the Arc/Surrounds/Subs;

https://en.community.sonos.com/home%2Dtheater%2D228993/lost%2Dsurround%2Dand%2Dsub%2Dafter%2Dupdate%2D6868561?postid=16594281#post16594281

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