Bachelor of Music (B.M., B.Mus., Mus.B. or Mus. Bac.) is an academic degree awarded by a college, university, or conservatory upon completion of program of study in music. In the United States, it is a professional degree; the majority of work consists of prescribed music courses and study in applied music, usually requiring a proficiency performing an instrument. Such a program lasts three to four and a half years.