Born in Modrath, near Cologne, the prolific musician wrote more than 300 works from orchestral pieces to pure electronic music during his career. Best known for his avant-garde electronic work, Stockhausen was an experimental musician who utilised tape recorders and mathematics to create innovative, ground-breaking pieces. His Electronic Study, 1953, was the first musical piece composed from pure sine wave sounds. Electronic Study II, produced a year later, was the first work of electronic music to be notated and published. But the composer rejected the idea that he was making the music of the future, writing in 1966: "What is modern today will be tradition tomorrow.