11L 21s is a 2/1-equivalent (octave-equivalent) moment of symmetry scale containing 11 large steps and 21 small steps, repeating every octave. 11L 21s is a great-grandchild scale of 1L 9s, expanding it by 22 tones. Generators that produce this scale range from 1087.5 ¢ to 1090.9 ¢, or from 109.1 ¢ to 112.5 ¢.

↖ 10L 20s ↑ 11L 20s 12L 20s ↗
← 10L 21s 11L 21s 12L 21s →
↙ 10L 22s ↓ 11L 22s 12L 22s ↘
Scale structure
Step pattern LsLssLssLssLssLssLssLssLssLssLss
ssLssLssLssLssLssLssLssLssLssLsL
Equave 2/1 (1200.0 ¢)
Period 2/1 (1200.0 ¢)
Generator size
Bright 29\32 to 10\11 (1087.5 ¢ to 1090.9 ¢)
Dark 1\11 to 3\32 (109.1 ¢ to 112.5 ¢)
TAMNAMS information
Related to 1L 9s (antisinatonic)
With tunings 5:3 to 2:1 (minisoft)
Related MOS scales
Parent 11L 10s
Sister 21L 11s
Daughters 32L 11s, 11L 32s
Neutralized 22L 10s
2-Flought 43L 21s, 11L 53s
Equal tunings
Equalized (L:s = 1:1) 29\32 (1087.5 ¢)
Supersoft (L:s = 4:3) 97\107 (1087.9 ¢)
Soft (L:s = 3:2) 68\75 (1088.0 ¢)
Semisoft (L:s = 5:3) 107\118 (1088.1 ¢)
Basic (L:s = 2:1) 39\43 (1088.4 ¢)
Semihard (L:s = 5:2) 88\97 (1088.7 ¢)
Hard (L:s = 3:1) 49\54 (1088.9 ¢)
Superhard (L:s = 4:1) 59\65 (1089.2 ¢)
Collapsed (L:s = 1:0) 10\11 (1090.9 ¢)
ViewTalkEdit