9L 9s

↖ 8L 8s	↑ 9L 8s	10L 8s ↗
← 8L 9s	9L 9s	10L 9s →
↙ 8L 10s	↓ 9L 10s	10L 10s ↘

┌╥┬╥┬╥┬╥┬╥┬╥┬╥┬╥┬╥┬┐ │║│║│║│║│║│║│║│║│║││ ││││││││││││││││││││ └┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┘
Scale structure
Step pattern	LsLsLsLsLsLsLsLsLs sLsLsLsLsLsLsLsLsL
Equave	2/1 (1200.0¢)
Period	1\9 (133.3¢)
Generator size
Bright	1\18 to 1\9 (66.7¢ to 133.3¢)
Dark	0\9 to 1\18 (0.0¢ to 66.7¢)
Related MOS scales
Parent	9L 0s
Sister	9L 9s
Daughters	18L 9s, 9L 18s
Neutralized	18L 0s
2-Flought	27L 9s, 9L 27s
Equal tunings
Equalized (L:s = 1:1)	1\18 (66.7¢)
Supersoft (L:s = 4:3)	4\63 (76.2¢)
Soft (L:s = 3:2)	3\45 (80.0¢)
Semisoft (L:s = 5:3)	5\72 (83.3¢)
Basic (L:s = 2:1)	2\27 (88.9¢)
Semihard (L:s = 5:2)	5\63 (95.2¢)
Hard (L:s = 3:1)	3\36 (100.0¢)
Superhard (L:s = 4:1)	4\45 (106.7¢)
Collapsed (L:s = 1:0)	1\9 (133.3¢)

9L 9s is a 2/1-equivalent (octave-equivalent) moment of symmetry scale containing 9 large steps and 9 small steps, with a period of 1 large step and 1 small step that repeats every 133.3¢, or 9 times every octave. Generators that produce this scale range from 66.7¢ to 133.3¢, or from 0¢ to 66.7¢. Scales of the true MOS form, where every period is the same, are proper because there is only one small step per period.

Modes

Modes of 9L 9s

UDP	Cyclic Order	Step Pattern
9|0(9)	1	LsLsLsLsLsLsLsLsLs
0|9(9)	2	sLsLsLsLsLsLsLsLsL

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