Darreg, Ivor [O'Hara, Kenneth Vincent Gerard]
- John Chalmers
- and Brian McLaren
[O'Hara, Kenneth Vincent Gerard]
(b Portland, OR, May 5, 1917; d San Diego, CA, Feb 13, 1994). American composer, instrument inventor and theorist. He studied the cello, the piano and wind instruments at an early age. A composition student of Charles Wakefield Cadman, he began to compose using quarter-tones and just intonation during the 1930s. Although ill health prevented him from attending college, he taught himself electrical engineering and invented pioneering electro-acoustical instruments, including the microtonal keyboard oboe (1936), the amplifying clavichord (1940), the amplified cello (1941) and the electric keyboard drum (around 1945). During the 1960s he designed and built a 60-tone electronic organ with an ‘elastic tuning’ system that automatically justified traditional musical intervals.
In 1962 M. Joel Mandelbaum’s 19-tone compositions and Ervin Wilson’s microtonal instrument patents introduced Darreg to new tuning systems. He began an intensive programme of musical exploration and discovered that all equal temperaments have uniquely valuable musical properties (‘moods’). To hear these scales, he refretted guitars to 14, 15, 16, 17, 18, 19, 22, 24 and 31 notes per octave and constructed metallophones with 5, 10, 13, 14, 15, 17, 19, 22, 24 and 53 notes per octave. During the 1970s he created justly-tuned Megalyra and Kosmolyra amplified steel-guitar-like instruments, the sound of which has been described as ‘tuned thunder’. His last compositions use retunable MIDI synthesizers....