User:Moremajorthanmajor/Ed9/4

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The equal division of 9/4 (ed9/4) is a tuning obtained by dividing the Pythagorean ninth (9/4) in a certain number of equal steps. An ed9/4 can be generated by taking every other tone of an edf, so even-numbered ed9/4's are integer edfs.

Properties

Division of 9/4 into equal parts does not necessarily imply directly using this interval as an equivalence. Many, though not all, ed9/4 scales have a perceptually important false octave, with various degrees of accuracy.

The structural utility of 9/4 or another major ninth is apparent by being the standard replacement for the root in jazz piano voicings. Also, as a ninth is the double of a fifth, the fifth of normal root position triads will become the common suspension (5-4 or 5-6) of a ninth-based system.

Individual pages for ed9/4's

1…99

1	3	5	7	9	11	13	15	17	19
21	23	25	27	29	31	33	35	37	39
41	43	45	47	49	51	53	55	57	59
61	63	65	67	69	71	73	75	77	79
81	83	85	87	89	91	93	95	97	99

See also

• User:Moremajorthanmajor/Ruhf's Ed9/4 theory

Todo: review , cleanup, improve layout