Nusakana Original Soundtrack DLC has been released! The DLC isn't only in FLAC format, but as a bonus, it will add Music Room to the game! So, not only can you listen to the soundtrack in FLAC glory, but you can enjoy seamlessly looped music, while reading composer commentary, in Music Room!
http://store.steampowered.com/app/441760
Have fun, and enjoy Nusakana!
Oh, for those who don't want to buy the soundtrack on steam, Nusakana OST is also available to buy on bandcamp: https://jcoopmusic.bandcamp.com/album/nusakana