Brotoles: I had this game by the time it was released... The intro HAS voice and digital sound effects (the very gate opening at the beginning of the intro has a digital sample, but it doesn't play in the GOG version).
BUT I think there was a catch to make it work properly, I just don't remember how... I thought someone here in the forum would know... :-/
Well, I'll research somewhere else and see if I can find out anything... If I do, I'll let you guys know :-)
I tweaked around with the audio settings, switching from GM to MT32 and SB, but no dice for intro voices.
Still, at least I found that MT32 with MUNT sounds the best of the lot musicwise.