i just read this from projector central.maybe some will be interested.
http://www.projectorcentral.com/felston_dd740.htm

I've been using the Felston DD740 for a few months now and it works great. Before 1.6 firmware upgrade to my XA2, The Matrix was really bad. But this fixed it. After 1.6 and 2.0, HD-DVDs were fixed, but some SD-DVD still have a bad lip-sync problem. This fixes all the lip-sync problems I threw at it. Of course, it only works with optical and /or coaxial. But if this is the way your audio set-up is and you are bothered by lip-sync problems, it will fix them.

Both formats have chronic issues with Lip Sync! I can't understand why they don't do a better job of testing the disks. I beleive the major problem is the way the players utilize and load the info to memory. The problem isn't getting any better either.

Both formats have chronic issues with Lip Sync! I can't understand why they don't do a better job of testing the disks. I beleive the major problem is the way the players utilize and load the info to memory. The problem isn't getting any better either.

Totaly agree, and I can't believe more people don't complain about this issue. I have noticed it on both formats but I have heard the most recent firmware has fixed this.

Audio delay compensation facilities are built into most modern AV electronics.