John Mcguire ( 1942- ) is a contemporary musician, guitarist, organist, and music editor from California, USA, who studied with Karlheinz Stockhausen and Gottfried Michael Koenig, and won the Gaudeamus Music Award. 1942-). He was married to soprano Beth Griffith, and made tape music based on his wife's voice, including the masterpiece "A Cappella". Cadence Music" (1982-85) was composed with 21 instruments, "Exchanges" (1998-2002) was composed for string quartet and soprano, and "Decadence Music" was composed with 8 horns. (1998-2002), "Decay" (1967-70) with eight horns, "Frieze" (1969-74) with four pianos, "Music for Music for Horns, Pianos, and Cymbals" (1981), the largest of his works, on two CDs. A 12-page booklet is included (in both German and English).