Was having a seemingly common issue with my newly acquired Sonos Beam/ One surround setup. the Audio was out of Sync but I couldn’t push it in the right direction via the app. After doing lots of reading on reddit and the support groups here I tried the following tweaks.
I switched out the HDMI from the TV out and used Optical - noticed a crisper wider sound but lip sync not improved.
I then removed the PlayStation VR setup attached to PS4 Pro.
This solved the problem straight away. Sound locked via PS4 now.
Bit annoying I will have to plumb it back in every time we want to use VR but its not our go to so I’d rather have Lip sync on and better sound anytime.
A lot of grumpiness about Sonos when I think for the most part its add on kit that causes the issues