I just grabbed an Arc, and set it up the other day and the audio was noticeably out of sync while watching Netflix. I tried adjusting the delay setting in the app, but nothing helped. I'm using a Sony Bravia X800H, and I'm connected to the ARC port since there's no eARC. I’ve been trying to figure this out few a few days now. And there’s no AV sync option on my tv. At least I can’t find it. Any advice? I’m thinking of returning it.