First music mod I have ever created, using the Hero's Pass soundtrack from Borderlands 2. might be a little rough around the edges.
Music used
Stealth
https://www.youtube.com/watch?v=6XqudG9q7Y0&t=76s
Control/Anticipation
https://www.youtube.com/watch?v=tzZkIJRVg8M
Assault
https://www.youtube.com/watch?v=j3X6l8C-mBg&t=203s
The "Hero's Pass" file goes into the mod_overrides folder. Enjoy!