This is a diagram drawn by composer Ian Bonighton of a ring modulator, used in electronic music. Bonighton's 1969 Master of Music included a section on Electronic Equipment used in composition, and he included circuit diagrams of the ring modulator…
Ian Bonighton, Sequenza, 1971
Grainger Museum Archive, 2017/23-2/10
Ian Bonighton (1942-1975) graduated in Music from the University of Melbourne in 1968, studying composition with Keith Humble. He was appointed to the teaching staff of the…