Extracting music from DVDs

I once did a rip of a DVD that had a normal 5.1 audio track, which I then split up in multiple tracks, one for each signal: left, right, center, left surround, right surround and LFE (low frequency). I use Cool Edit Pro as it has a very good multi-track editor which let me isolate each track in a separate WAV file.

I was then able to isolate the music with sound effects, but without voices. Normally, as the sound effects are embedded in the left and front signals, there's no way to physically extract only the music, except if you have a music-only audio track available, which only a select number of DVD's have.

As for the procedure on how I did it, I would have to look up the what and the how, because it's rather complicated and it took me a lot of time and work to get the result I wanted.

Jam it back in, in the dark.