Is adding music possible?

[fud]

Yep.

The stock version of the game has about 30-40 mp3s that are used for the 220+ sectors. The bulk of which are the batch between 00019.mp3 and 00040.mp3.


If you take your own mp3s (soundtracks, Slayer, whatever) and rename them to match those numbers in the soundtrack folder, you'll have new music, but it will be repeated as often as the Ego tracks.

By editing the universe file (map) and changing each sector's music track to a unique number with a matching numbered mp3 in the soundtrack folder, you can have a single track per sector.

But, this requires a new game start, where the renaming method does not.