3L 20s
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Scale structure
Step pattern
LssssssLsssssssLsssssss
sssssssLsssssssLssssssL
Equave
2/1 (1200.0¢)
Period
2/1 (1200.0¢)
Generator size
Bright
15\23 to 2\3 (782.6¢ to 800.0¢)
Dark
1\3 to 8\23 (400.0¢ to 417.4¢)
TAMNAMS information
Descends from
3L 5s (checkertonic)
Ancestor's step ratio range
6:1 to 1:0
Related MOS scales
Parent
3L 17s
Sister
20L 3s
Daughters
23L 3s, 3L 23s
Neutralized
6L 17s
2-Flought
26L 20s, 3L 43s
Equal tunings
Equalized (L:s = 1:1)
15\23 (782.6¢)
Supersoft (L:s = 4:3)
47\72 (783.3¢)
Soft (L:s = 3:2)
32\49 (783.7¢)
Semisoft (L:s = 5:3)
49\75 (784.0¢)
Basic (L:s = 2:1)
17\26 (784.6¢)
Semihard (L:s = 5:2)
36\55 (785.5¢)
Hard (L:s = 3:1)
19\29 (786.2¢)
Superhard (L:s = 4:1)
21\32 (787.5¢)
Collapsed (L:s = 1:0)
2\3 (800.0¢)
↖ 2L 19s | ↑ 3L 19s | 4L 19s ↗ |
← 2L 20s | 3L 20s | 4L 20s → |
↙ 2L 21s | ↓ 3L 21s | 4L 21s ↘ |
┌╥┬┬┬┬┬┬╥┬┬┬┬┬┬┬╥┬┬┬┬┬┬┬┐ │║││││││║│││││││║││││││││ │││││││││││││││││││││││││ └┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┘
sssssssLsssssssLssssssL
3L 20s is a 2/1-equivalent (octave-equivalent) moment of symmetry scale containing 3 large steps and 20 small steps, repeating every octave. 3L 20s is related to 3L 5s, expanding it by 15 tones. Generators that produce this scale range from 782.6¢ to 800¢, or from 400¢ to 417.4¢.
This is the MOS where the small steps split 7-7-6 among the large steps. Its generator is a supermajor third no larger than 8/23edo (417.391 cents), which is almost exactly 14/11.
Modes
UDP | Cyclic Order |
Step Pattern |
---|---|---|
22|0 | 1 | LssssssLsssssssLsssssss |
21|1 | 16 | LsssssssLssssssLsssssss |
20|2 | 8 | LsssssssLsssssssLssssss |
19|3 | 23 | sLssssssLsssssssLssssss |
18|4 | 15 | sLsssssssLssssssLssssss |
17|5 | 7 | sLsssssssLsssssssLsssss |
16|6 | 22 | ssLssssssLsssssssLsssss |
15|7 | 14 | ssLsssssssLssssssLsssss |
14|8 | 6 | ssLsssssssLsssssssLssss |
13|9 | 21 | sssLssssssLsssssssLssss |
12|10 | 13 | sssLsssssssLssssssLssss |
11|11 | 5 | sssLsssssssLsssssssLsss |
10|12 | 20 | ssssLssssssLsssssssLsss |
9|13 | 12 | ssssLsssssssLssssssLsss |
8|14 | 4 | ssssLsssssssLsssssssLss |
7|15 | 19 | sssssLssssssLsssssssLss |
6|16 | 11 | sssssLsssssssLssssssLss |
5|17 | 3 | sssssLsssssssLsssssssLs |
4|18 | 18 | ssssssLssssssLsssssssLs |
3|19 | 10 | ssssssLsssssssLssssssLs |
2|20 | 2 | ssssssLsssssssLsssssssL |
1|21 | 17 | sssssssLssssssLsssssssL |
0|22 | 9 | sssssssLsssssssLssssssL |
Scale tree
Generator(edo) | Cents | Step Ratio | Comments | |||||||
---|---|---|---|---|---|---|---|---|---|---|
Bright | Dark | L:s | Hardness | |||||||
15\23 | 782.609 | 417.391 | 1:1 | 1.000 | Equalized 3L 20s | |||||
77\118 | 783.051 | 416.949 | 6:5 | 1.200 | ||||||
62\95 | 783.158 | 416.842 | 5:4 | 1.250 | ||||||
109\167 | 783.234 | 416.766 | 9:7 | 1.286 | ||||||
47\72 | 783.333 | 416.667 | 4:3 | 1.333 | Supersoft 3L 20s | |||||
126\193 | 783.420 | 416.580 | 11:8 | 1.375 | ||||||
79\121 | 783.471 | 416.529 | 7:5 | 1.400 | ||||||
111\170 | 783.529 | 416.471 | 10:7 | 1.429 | ||||||
32\49 | 783.673 | 416.327 | 3:2 | 1.500 | Soft 3L 20s | |||||
113\173 | 783.815 | 416.185 | 11:7 | 1.571 | ||||||
81\124 | 783.871 | 416.129 | 8:5 | 1.600 | ||||||
130\199 | 783.920 | 416.080 | 13:8 | 1.625 | ||||||
49\75 | 784.000 | 416.000 | 5:3 | 1.667 | Semisoft 3L 20s | |||||
115\176 | 784.091 | 415.909 | 12:7 | 1.714 | ||||||
66\101 | 784.158 | 415.842 | 7:4 | 1.750 | ||||||
83\127 | 784.252 | 415.748 | 9:5 | 1.800 | ||||||
17\26 | 784.615 | 415.385 | 2:1 | 2.000 | Basic 3L 20s Scales with tunings softer than this are proper | |||||
70\107 | 785.047 | 414.953 | 9:4 | 2.250 | ||||||
53\81 | 785.185 | 414.815 | 7:3 | 2.333 | ||||||
89\136 | 785.294 | 414.706 | 12:5 | 2.400 | ||||||
36\55 | 785.455 | 414.545 | 5:2 | 2.500 | Semihard 3L 20s | |||||
91\139 | 785.612 | 414.388 | 13:5 | 2.600 | ||||||
55\84 | 785.714 | 414.286 | 8:3 | 2.667 | ||||||
74\113 | 785.841 | 414.159 | 11:4 | 2.750 | ||||||
19\29 | 786.207 | 413.793 | 3:1 | 3.000 | Hard 3L 20s | |||||
59\90 | 786.667 | 413.333 | 10:3 | 3.333 | ||||||
40\61 | 786.885 | 413.115 | 7:2 | 3.500 | ||||||
61\93 | 787.097 | 412.903 | 11:3 | 3.667 | ||||||
21\32 | 787.500 | 412.500 | 4:1 | 4.000 | Superhard 3L 20s | |||||
44\67 | 788.060 | 411.940 | 9:2 | 4.500 | ||||||
23\35 | 788.571 | 411.429 | 5:1 | 5.000 | ||||||
25\38 | 789.474 | 410.526 | 6:1 | 6.000 | ||||||
2\3 | 800.000 | 400.000 | 1:0 | → ∞ | Collapsed 3L 20s |