What a fantastic game. The hours my brother has sank in it, the ones I'd just sit there and watch. The hours I myself sank into it, reading the manual page to page...
I do agree with you, it's music hasn't aged particularly well, although I love the music tracks themselves. How did you get higher quality music files? Do they exist inside the game data?

Well, no they don't. I just re sampled the files with Audacity so I did not actually improve their actual quality.
But providing the game engine could run Higher bitrate wav files ( 44khz 16 bit aka CD format would be golden ) there are several possibilities.

1. Remaster the original files. Using filters to remove the quantization noise and restore the high frequencies with some DSP plugins could put a fresh shine on the old music.
2. A skilled person could do high quality remix of the music.
3. I suppose the author of the original music originally had higher quality recordings of the music. If With some far fetched luck, those were archived and the gods or retro gaming are kind, they could be restored to us.

Still, this all means nothing unless the game engine can be made to play higher bit rate PCM.

You are talking about the DOS version I guess? I didn't know for years that there even was one, when I tried it some time ago I found the sound quality to be inferior to the Windows version, among other things. So try that if you haven't already.

Ironically, only the DOS version works on my modern (Win 7) PC, thanks to DOSBOX, but good call none the less. I will try installing it on one of my retro machines when I get the chance.

I just installed that DOS version again. Yeah, that is quite astonishingly bad. The multiplayer community can go ahead and play that version, I certainly won't 😀