# 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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