Why would the ps3 re-encode the audio, I believe the blu-ray disk has a DTS track on it, unless it is converting from 7.1 to 5.1?
It has DTS-HD track (if my memory is working right this morning), so the player has two options for optical output: use the DTS core track or decode the DTS-HD track and re-encode. If the PS3 is trying to allow for secondary audio (menu clicks, etc.), then it will need to do the latter so it can add the secondary audio stream onto the original DTS-HD track.
The one Idea I had was to start using the dvi selector on the 990 but to be honest I would much rather avoid this. Does the DVI selector have any problems with 3d? Does it processes the video or is it just a connection? If its just a connection then it wont help my delay problem, and if it processes the video I would imagine the quality would be slightly degraded by the older technology so its kind of a loose loose here.
The DVI switching is purely a video pass-through. I haven't heard what luck folks have had using the DVI switching with 3D sources. In theory, it could work.
I will be using the oppo analog outputs soon so this problem may go away, but to be honest I have noticed the same thing happening on my other sources as well (particularly my fios DVR, and sometimes on the 360). Another Idea I had was to look for as many video processing enhancements as possible on the television and enable all of them, with the thought that I will be delaying the video by a few microseconds.
Any thoughts?
Video sync with the BDP-93 and BDP-95 has been pretty solid for a while now. It will be interesting to see what happens when you watch the same disc with the 95.
It's a little odd to me that you've noticed sync problems elsewhere that appeared to be video ahead of audio. I wonder if you have your speaker distances set correctly in the 990? A really high speaker distance setting on even one major channel (center or one of the fronts) might cause such an effect, although I don't recall ever experiencing it.