Blade Symphony OST by Tom Stoffel now available as purchasable DLC!
http://store.steampowered.com/app/301600/
Here are three tracks for you to check out.
https://www.youtube.com/watch?v=MwMRutCCRbQ
Mastery, an unreleased track as part of the B-Sides cut content.
https://www.youtube.com/watch?v=BI5CBYt9bXI
Chandelier Showdown (Shattered Version), an earlier and re-mastered version of the in-game combat track of the same name.
https://www.youtube.com/watch?v=mAeQf5VOCN4
Sheathe Society, an unreleased track that includes yelling out sword names as katas.
There are 37 tracks total in the OST including a bonus "Duel Box" soundtrack with a combined total of 2 hours and 8 minutes of music.
And finally, just incase you missed this:
http://www.blade-symphony.com/2014/04/art-of-the-musical-duel/
And if you haven't already, check out this blog post by Tom Stoffel, Blade Symphony's composer, on how he created the soundtrack. Plenty of examples for you to listen to.
You can follow Tom via twitter @tomstoffelsound and his website http://www.tomstoffel.com/ to listen to more of his work.