Bofferbrauer2 said:
Apparently, the first 2 games had been totally remade in Unity and couldn't reuse the old assets, including sound files. That's probably because the originals were programmed on NeXT computers, which were more comparable to MacIntoshs and Amigas of the time then to PCs (and it's OS was the base of MacOS), and none of the software used back then works on a PC or even Mac these days. So they had to completely remake them. |
Doom music was done in General Midi, every synthesizer and software can play these.
You should be able to play them in Windows Media Player if you have the GM soundfont (or any other) installed.
https://midiarchive.co.uk/midi/Games/Doom