My video is ahead of my sound. If I understand correctly, lip sync adjustments are for slowing down the sound? I would just try changing the settings but the lip sync menu is unaccessible (can't select it). I wrote Yamaha help and they were no help. Sound with discs seems good but Netflix, Amazon Prime, and cable thru the set top box all have a distracting delay of sound after video.
I recently added the Sony Disc Player and an Outlaw amp for my front channels. I can't swear when the problem started but thinking it was one or the either.
Any help appreciated.
Have you used MusicCast? If so, go into the app and change your AVR to 'lip sync' and not 'audio sync'.
Even if you haven't used MusicCast, try downloading it and giving it a nudge either way.