Miracle temperament

George Secor (born November 8, 1943), a composer from Chicago, is the discoverer of miracle temperament and eponym of the secor.

Secor and Hermann Pedtke's Motorola Scalatron (1974) is a Bosanquet generalized keyboard featuring a multicolored arrangement of 240 tunable oval keys, about which Secor said: "There is not much point in using this alternative keyboard for systems below 31 tones in the octave." However, "even if it were completely impractical musically, it would make a wonderful prop for a futuristic movie." Though its synthesizer capacities may not reach performance level, according to Easley Blackwood, "It has rock-steady tuning capabilities; you can always count on it to be right."

In music, a secor is the interval of 116.7 cents ((18/5)^(1/19))  Play  named after George Secor. Secor devised it to allow a close approximation, generated from a single interval, to Harry Partch's 43 tone just intonation scale. All 11-limit consonances are approximated to within 3.32 cents.

It is approximated in 31  Play , 41  Play , and 72 equal temperament  Play . For tuning purposes, a secor of seven steps of 72 equal temperament is often used.

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