9L 9s

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↖ 8L 8s ↑9L 8s 10L 8s ↗
← 8L 9s9L 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 none
Sister 9L 9s (self)
Daughters 18L 9s, 9L 18s
Neutralized 18edo
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 Rotational order Step pattern
9 | 0(9) 1 LsLsLsLsLsLsLsLsLs
0 | 9(9) 2 sLsLsLsLsLsLsLsLsL
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