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Penthouse serenade george secor baby accordion
George Secor (born November 8, 1943), a composer from Chicago, is the discoverer of miracle temperament and eponym of the secor.
Contents
- Penthouse serenade george secor baby accordion
- Edvard grieg morningmood from peer gynt suite no 1 george secor accordion
- Secor
- Miracle temperament
- References
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."
Edvard grieg morningmood from peer gynt suite no 1 george secor accordion
Secor
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.
Two secors (233.4 Play ) approximate an 8:7 interval (231.17), a septimal whole tone. Three of these 8:7 intervals (693.51), or six secors (700.2 Play ), approximate a fifth (701.96). A neutral third of 11:9 (347.41) is approximated by three secors (350.1 Play ).
Miracle temperament
In music, miracle temperament is a regular temperament discovered by George Secor in 1974 which has as a generator an interval, called the secor, that serves as both the 15:14 and 16:15 semitones. Because 15:14 and 16:15 are equated, their ratio 225:224
A septimal whole tone of 8:7 as we have seen is approximated by two secors, and a neutral third of 11:9 by three secors. In miracle, a minor third plus a septimal whole tone is also equated with the 11th harmonic. This means that the gap between a minor third plus a septimal whole tone
For tuning purposes, a secor of seven steps of 72 equal temperament can be used. While this also tempers out 4375:4374 (the ragisma), doing this is not regarded as a part of the definition of miracle temperament.
Miracle temperament, particularly in the ten note Miracle scale ( Play ) and the distributionally even scale known as Blackjack ( Play ). The twenty-one note Blackjack scale is derived from twenty successive secors and has been used by several composers, including New York composer Joseph Pehrson.
this may also be viewed as a chain of 20 secors:
>0 >1 >2 >3 >4 >5 >6 >7 >8 >9 0 1 2 3 4 5 6 7 8 9 <0 s s s s s s s s s s s s s s s s s s s s