An On Bast is Anna Suda (Poznań, PL), music - maker, producing electronic music since 2003. Her idea of creating/playing is to follow a particular sound and to be chosen by it. Not to choose is one of the principles of composing. What's most important, it's a very delicate process during which a music-maker allows the sound itself to determine the way it is played.
Result is Delicate Synthetic Music (DSM - probably a type of IDM):