I guess this is from one of the cd-rom versions, which from what I understand from the game’s wikipedia article, had the original midi music converted into cd audio tracks.
This made me look into the files of GOG’s release I am playing atm and it seems that these tracks are in fact included in .ogg format, which I think is a nice touch from GOG. Durations, number of tracks, and track numbers seem to match with the video’s description (I like that track #1 is missing since this was the game’s binary blob in the original CD).
Inside the game, if you open Preferences, there is a check box called CD Music but I don’t know if you can make this work. Maybe if you have the original CD and install the game from there.
Personally I prefer the original midi sound, and I think dosbox does a very good job making the game sound as close as what my old sound card used to sound, or at least that’s how I remember it since my old hardware is unfortunately long gone.
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