Dolby Atmos sync issue with Apple TV

I’m sort of in the same boat as well. AppleTV 4K and a Samsung Frame TV with a Sonos Arc (and sub) setup. Netflix, Disney+ all work just fine but the Apple TV plus app has major sync issues. The only thing I’ve found that works is turning off the Atmos and going with only 5.1 on the Apple TV sound settings. Everything else was problematic. I’ve also used the native apps on the Samsung and no issues, so it definitely feels like an issue with the Apple TV at this point.

This broke again with the latest GA software. Go figure.

The good news is, I think it's related to eARC. I changed my topology so that the ATV was going directly to my AVR and the issue went away.

Previously I had been connecting to my LG C9 TV and using eARC to pass the audio back to my Sony STR-DN1080 AVR. Now with a direct connect to the AVR things are working fine. Whew.

Same issue for me in the Apple TV app and Paramount+ app. "Match Content" video settings and "Change Format" audio settings don't seem to matter. I can fix it by turning the "Dolby Atmos" audio setting off (not a solution if I want Atmos audio, obviously).

Same issue, I tried all settings possible in the Apple TV.

I have a sonos arc and samsung smart tv with e-arc, when using TV apps, no problem at all, audio is synced and amazing, but when using Apple TV apps with dolby, I have lip sync issues, have tried audio delay in the sonos configuration, match content on/off, 16bit/auto and nothing works. It is really annoying.

I do not know if AppleTV connecting to other apple products in the room is affecting this (e.g. iphone or ipad). I disabled continuous play in other devices, but nothing works.

at this point wanting to trow away the appletv

ATV should go to the STR. Try that? And keep even if no change.

Same exact issue. Reset AV settings, and pulled the power on all devices in my chain for a couple minutes. No difference.

2.0 and 5.1 are fine. Atmos is several frames out of sync in all apps. Unwatchable.

Gear:

LG C9

Apple TV 4K (second gen on 17.1)

Sony STR-DN1080

ATV goes to TV, then eARC to AVR.

I have the same problem ... and this is a recurring issue: it was present for some time after I bought the AppleTV4K over two years ago; then it was fixed but just recently audio has been going out of sync in Dolby Atmos again.

My ATV4K is connected to a Panasonic OLED (JZ2000) with built-in Dolby Atmos system. In the TV's native apps audio is synced, on the AppleTV there is a significant delay.

Disabling Atmos fixes the problem; no sync issues in 5.1

Still having this same issue. Bypassing this and using tv based apps is not the solution. I am about to buy another Apple TV box to see if that is the issue. But clearly my Sonos and tv are fine if excluding the Apple TV box. Apple support wanted me to go through a rigmarole and send them a bunch of data. I have tried 5 different cables. Downgrading the Atv box to don’t 5.1 used to fix the problem. Now I’m having issues with syncing even on 5.1. It’s crazy. If it was app specific I would say maybe it’s the provider. But it’s all Apple TV apps.

has anyone been successful fixing it or is everyone like me. Get motivated to fix it. Try a bunch of stuff that doesn’t work. Then give up again when super frustration sets in. Then revisit it when you have calmed down after a few months. I’ve lost my marbles on numerous occasions.

i now have the system in stereo. Which seems to be ok. But my brother came over and still can see syncing issues. I’ve about had it with this setup. I can’t see how it’s not an Apple TV issue. How can you want to control the living room experience, Apple, when you can’t help us troubleshoot this. Asking me to check the cable again is not productive.

That's all well and good, but one of the main reasons I bought this device was because of the framerate matching to run a pure clean 24fps signal to my TV. Bypassing it defeats the purpose of using this over another streaming device like the NV Shield Pro (which has better audio format compatibility anyway). This needs to be fixed or at least give us a manual AV signal delay control slider so we can sync it up ourselves without relying on having to own an iPhone to automagically do it (and still have it be wrong!)

Update. It helps at times, but not always. It’s so variable.

given the issues now with Dolby digital content only playing in stereo I am minded to get rid of the thing and get an Amazon fire TV 4K stick.

How long is the HDMI cable connected to the Apple TV?

What is “shortest”?

It is 0,5 m.

This resolved the issue for me too. Thanks!

I think you might using TV's eArc functionality at the same time.