Hitbox Team’s Terrence Lee has made the awesome Dustforce Soundtrack available for download on his official site. The asking price is $3.99 for the full album or you can spend more if you wish. You can also buy each track for $0.99. If you buy the entire album you get 2 bonus tracks plus track liners and insert notes.
You can read about the motivation behind the music for Dustforce in our interview.