Karsten Obarski (handle Obi) was a
German composer at reLINE Software, a video game development company. Karsten is most
famous for writing the first tracker for the Amiga, the Ultimate Soundtracker. Later
famous trackers such as ProTracker are based on Ultimate Soundtracker's interface and file format. Soundtracker is a piece of software that allowed for four-channel hardware mixing on all Amiga computers.