I recently started having serious lip sync issues between my Apple TV and Sonos Arc. It has worked fine for almost 2 years until a month ago. The issue is most prevalent with Netflix but exists across multiple video services on the Apple TV. I’ve tried using lip sync on all the devices to no avail.
I am running through a LG OLED TV with the HDMI arc set up, with the same cables I’ve used for the past two years. All of the devices have the latest firmware and software updates, all have been rebooted all have been unplugged and plugged back in, deleted, and re-added, etc. etc. etc.
I am able to isolate that the problem is with the Apple TV. When using LG’s built-in, Netflix or Amazon prime TV app, the lip sync issues completely disappear. The built in apps suck compared to the Apple TV but the Apple TV lip sync issues are unbearable (and, frankly, unacceptable and surprising For “technically advanced companies“ like these).
Best answer by AirgetlamView original