15L 4s

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↖14L 3s↑15L 3s 16L 3s↗
←14L 4s15L 4s16L 4s→
↙14L 5s↓15L 5s 16L 5s↘
Brightest mode LLLLsLLLLsLLLLsLLLs
Period 2/1
Range for bright generator 5\19 (315.8¢) to 4\15 (320¢)
Range for dark generator 11\15 (880¢) to 14\19 (884.2¢)
Parent MOS 4L 11s
Sister MOS 4L 15s
Daughter MOSes 19L 15s, 15L 19s
Equal tunings
Supersoft (L:s = 4:3) 19\72 (316.7¢)
Soft (L:s = 3:2) 14\53 (317¢)
Semisoft (L:s = 5:3) 23\87 (317.2¢)
Basic (L:s = 2:1) 9\34 (317.6¢)
Semihard (L:s = 5:2) 22\83 (318.1¢)
Hard (L:s = 3:1) 13\49 (318.4¢)
Superhard (L:s = 4:1) 17\64 (318.8¢)

15L 4s is an MOS pattern generated by a large minor third of 5\19 (~315.8 ¢) to 4\15 (320 ¢). It is notable as the MOS scale of Catakleismic[19].

Scale tree

Generator Bright gen. Dark gen. L s L/s Comments
5\19 315.789 884.211 1 1 1.000 Equalized 15L 4s (Degenerate case)
29\110 316.364 883.636 6 5 1.200
24\91 316.484 883.516 5 4 1.250
43\163 316.564 883.436 9 7 1.286
19\72 316.667 883.333 4 3 1.333 Supersoft 15L 4s
52\197 316.751 883.249 11 8 1.375
33\125 316.800 883.200 7 5 1.400
47\178 316.854 883.146 10 7 1.429
14\53 316.981 883.019 3 2 1.500 Monosoft 15L 4s
51\193 317.098 882.902 11 7 1.571
37\140 317.143 882.857 8 5 1.600
60\227 317.181 882.819 13 8 1.625 Golden 15L 4s sequence can be found here
23\87 317.241 882.759 5 3 1.667 Semisoft 15L 4s
55\208 317.308 882.692 12 7 1.714
32\121 317.355 882.645 7 4 1.750
41\155 317.419 882.581 9 5 1.800
9\34 317.647 882.353 2 1 2.000 Basic 15L 4s (Generators smaller than this are proper)
40\151 317.881 882.119 9 4 2.250
31\117 317.949 882.051 7 3 2.333
53\200 318.000 882.000 12 5 2.400
22\83 318.072 881.928 5 2 2.500 Semihard 15L 4s
57\215 318.140 881.860 13 5 2.600
35\132 318.182 881.818 8 3 2.667
48\181 318.232 881.768 11 4 2.750
13\49 318.367 881.633 3 1 3.000 Monohard 15L 4s
43\162 318.519 881.481 10 3 3.333
30\113 318.584 881.416 7 2 3.500
47\177 318.644 881.356 11 3 3.667
17\64 318.750 881.250 4 1 4.000 Superhard 15L 4s
38\143 318.881 881.119 9 2 4.500
21\79 318.987 881.013 5 1 5.000
25\94 319.149 880.851 6 1 6.000
4\15 320.000 880.000 1 0 → inf Collapsed 15L 4s (Degenerate case)