 After selling the first copy of MusicMaster to WCXI-FM/Detroit, Knapp rewrote the program for the Radio Shack TRS-80 and then for the IBM PC.By 1985, it was licensed for distribution by Tapscan and sold as MusicScan.When a legal dispute ended A-ware's relationship with Tapscan in 1994, Knapp formed his own company and distributed the program as MusicMaster.