There is some weirdness in the way this game was released as the original release of the game did have audio tracks but most if not all of the following budget re-releases of the game lacked audio tracks (because of lazy publishers or because of the game being on DVD I guess). Now checking the dumps here, neither of them include audio tracks in their data so I assume they have both been ripped from a re-release of the game.
http://redump.org/disc/9876/
http://redump.org/disc/1787/
The point I'm trying to get across is that I think they should bear some kind of tags to either indicate they originate from a re-release or that they lack the Red Book audio data.