Signed up just to post this. It's not the most elegant way but if you can find player (br or DVD) with multi channel out, you can have more success. I know i had a br player with discrete outputs so I could get uncompressed audio in my home theater. Aldo, i have a background in audio production and have a multi channel audio input board in my production setup. It would be time consuming to say the least but if a multi-channel out were used, each of the five channels could be captured real-time and recorded on their own separate tracks. The dialog channel is more often than not just dialog. Hope this helps and if it's been covered already just forgive me for being too lazy to read all three pages. I have a session coming up. Sorry!
cheers
chrid