Apple TV 4K audio out of sync

RSoxNo1 wrote:

We have an LG 65B7A connected via optical cable to a Pioneer VSXLX102 receiver. We have the 4k Apple TV connected directly to the TV via HDMI 3. I've set the receiver at -100ms and I'm still seeing the video ahead of the audio. I have Dolby Vision and Atmos disabled on the TV.

With most lip-sync issues I've encountered, the audio arrives before the video. I'm not sure about the Pioneer receiver, but on my Denon, a setting of -100ms would delay the audio and make the problem worse, not better. Are you still having this problem?

I am having the exact same problem, same TV and everything. On another forum someone mentioned it woudl be fixed in a firmware update by Apple or LG, but it is really annoying and has started happening with apps about a week after hooking up my ATv4k

I have an LG OLED55E7N TV, and when using Dolby Vision, I get the sound out of sync with video - not 3 secs, like the OP, but very obvious - maybe 1/4 second. It's watchable, but really annoying. Switching to 4K HDR, rather than Dolby Vision, and the sync is perfect.

Dolby Vision is better than 4K HDR, and tvOS is evidently trying to encourage you to use that, e.g. if you aren't using it, and go to the video settings, there's a special menu option 'Enable Dolby Vision'. So I hope this gets fixed - this TV is fantastic, and is really nice with the Apple TV 4K, except for this issue.

I have the same problem on the same TV.

I purchased a Belkin HDMI compatible with Dolby Vision as suggested on the Apple support forum and by a LG rep in our local AV store and it didn't make any difference.

I'm now wondering if it could be something to do with my internet connection speed although the picture quality and the sound quality is perfect its just the audio synching.

Please sort this out Apple i've just spent £2500 on this new set up and it's not working.

I did the same. Bought a bell in cable etc. it isn’t your internet unless you have dial up. LG told me it was an Apple firmware issue. Switching sound, hertz, etc hasn’t worked for me. And my 4 k DVD player doesn’t do this. Neither does 4 k from prime or Netflix. Hopefully Apple fixes it with and update.

I bought a second Belkin Cable Tried all 4 inputs on my tv and even resorted to exchanging my television and Apple 4K and it still does it. Definitely something wrong with the firmware Apple TV 4K software.

I have the same problem. I have an LG Oled E7 (2017). I’ve tried 3 different HDMI cables (including one purchased for $50 rip-off price at Apple Store).

HBO Go, Netflix 4K content, iTunes, all of these sources have severely out-of sync audio often filled with stutters and artifacts.

Apple has dropped the ball on their “It just works” slogan. iOS 11and Apple TV 4K, are probably some of apple’s poorest examples of QA.

They didn’t test this Apple TV 4K device with the latest and greatest OLED TVs of 2017? How?

Good question. ”It just works” means that when you replace an old Apple TV with a newer and more expensive model, you don’t get a regression in your experience. It means that if you have a pretty standard and modern setup, you don’t have to hop on a forum to find out why your device doesn’t work correctly. It means _you_ aka the _customer_ doesn’t have to do QA for a company the size of Apple who prides themselves in releasing things when the “technology is ready”. I pay the Apple tax not to have the fastest computer, or latest VR prototype-quality hardware like Microsoft’s mixed reality. I pay the Apple tax for something fully formed, tested, reliable, and easy to use with a beautiful design outside & inside.

I have the same problem with my LG OLED E7 TV. Audio is out of sync by 3 or 4 seconds, regardless of the Video app I'm using (e.g., Netflix, HBO GO). I haven't tried disabling Dolby Vision yet, so perhaps that'll work (though I doubt it, and it shouldn't be required in any case). I strongly suspect this is an issue with the Apple TV rather than the TV. Hopefully a firmware update will become available soon to resolve this, as this behavior is unacceptable.

Same issue for me. 2017 LG C7 TV, new Apple TV 4K. Using a certified Monoprice HDMI cable.

Audio lag is minimal when output is set to stereo. Lag is significant when Dolby Digital 5.1.

My audio is going into the TV via HDMI, then down to a SONOS Playbar via optical.

Seems notably worse with the Apple TV 4K than what I was seeing with my previous Apple TV (1080p).

Really hoping the rumor of a firmware update, on either side, is true.

Adding another point - the audio sync issue definitely goes away if I set the Apple TV 4K output to Dolby Vision 4K at 24 Hz. So, this is a good work-around for movies. But definitely need it to perform as well, at 60 Hz!

According to this Forbes article, the update started rolling out yesterday and is expected to be available everywhere by the 20th.

https://www.forbes.com/sites/johnarcher/2017/10/16/new-lg-oled-tv-update-introdu ces-two-major-new-features/#4f9b89ce22d6

According to this article, the update adds "support for Dolby Atmos True HD playback over HDMI" ... I suspect this is the factor that solves the Apple TV 4K audio sync issues.

On your LG, if you go to Settings --> All Settings --> General --> About This TV (you have to scroll down) ... at the top of that screen, you will see the software version number. It should say 04.70.07 if it is the latest version. This version is scheduled to roll out in different regions over the next few day, so it may not have been pushed out to you yet. No sure.

I was having the audio sync problem prior to installing this last night. Once installed everything is fixed with Dolby Atmos on and Apple TV 4K outputting audio at "Best Quality Available."

My son and I watched several 4K shows today, and the audio is syncing perfectly on the E7.