Have you always wanted to listen to the music of An Octave Higher outside of the game? We have good news for you. You can now get the soundtracks from Steam and Playism as downloadable content (DLC). We have two soundtracks: the Basic Soundtrack contains public domain classical music and can be downloaded for absolutely free, while the Extended Soundtrack contains original compositions and is available for just $2.99.
You can also get a bundle containing the game and the soundtracks from both Steam and Playism.