Originally Posted by Dioneo
I have had mixed results with THD lip-synch. I don't own many HDVDs (and I haven't tried King Kong yet) so the only title I experienced this with is Batman Begins.
I switched to THD just after the movie started, and didn't notice any problem with lip-synch. At one point I stopped the movie and when it resumed there was very noticeable audio lag. I then skipped back to the start of the chapter, and the audio synched up again.
Yes, I've experienced this too, for example with Mission Impossible: III. However, it seems for me that this is actually the lesser problem in a way. Sometimes the sound goes way off sync, but when it is not way off sync, it still may be very slightly but persistently off sync, depending on the title. (This is not true for all titles. For exxample, Casablanca is perfectly synced, but it's just a mono title.) However, for the latter slight sync problem, the problem is small enough that some people may not notice it, especially on some home theatre setups (where there might be slight video lag inherent to the TV).
I was playing the movie on a Sony KDS-R60XBR1, which has some audio lag which I compensate for by putting a 30ms delay on my Yamaha RX-V995.
That is video lag. The compensation by your Yamaha is to ADD a delay in the audio
The problem with the Xbox 360 HD DVD setup is that we start off with audio lag. Adding delay with your Yamaha would just make things worse. Unfortunately, there is no easy way to add compensatory video delay for movies.