I’m having problems getting voice (audio) synchronized with people’s lips in the video. I have a Sonos Arc connected to the HDMI port on an LG OLED77C3PUA.AUS TV.
The TV has a Voice Sync option which seems to help sometimes, but I seem to have to use different settings for each TV show or video. I also tried the audio bypass which disables the voice sync and that sometimes helps, but not always. The build in speaker doesn’t have this problem.
I haven’t tried the TV Dialog Sync in the Sonos App yet. Maybe that will help.
Between the TV and ARC there are an overwhelming number of settings. I hope that software updated in the future will take care of this problem automatically. I see no reason that the user should have to make adjustments to compensate for the delay caused by HDMI. The hardware should take care of this automatically.