Ivor Darreg (1917-1994) was born Kenneth Vincent Gerard O'Hara in Portland Oregon. His principal musical interest was in non-12 tone equal tempered scales and in making instruments that could play such music. All of his music is written or recorded on tape and some is available on a CD titled Detwelvulate! (de-twelv-ulate).
Brief biography and summary of major musical contributions from Frog Peak Music.
Biographical material, photograph, and details of his theories and contributions to electronic music and instruments.
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