So originally I planned to use .wav file renders of some mods that I found on The Mod Archive. But when I started adding the songs, I saw raylib has built-in support for some mod formats (including .xm, which is what I'm using)!
Archive here: https://computermouth.itch.io/big-mod-music-pack
(all either CC0, CC BY, CC BY SA, or Public Domain)
Demo here: https://twitter.com/ComputerMouth/status/1735733875928678517
Why use mods?
The .wav renders of the two songs I'm using were ~10MB @ 44.1Khz, whereas the .xm files are each 24KB. Not only does this mean smaller distributables, but they also load much faster, and raylib also seems to switch between them faster.