15L 4s

↖ 14L 3s	↑ 15L 3s	16L 3s ↗
← 14L 4s	15L 4s	16L 4s →
↙ 14L 5s	↓ 15L 5s	16L 5s ↘

┌╥╥╥╥┬╥╥╥╥┬╥╥╥╥┬╥╥╥┬┐ │║║║║│║║║║│║║║║│║║║││ │││││││││││││││││││││ └┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┘
Scale structure
Step pattern	LLLLsLLLLsLLLLsLLLs sLLLsLLLLsLLLLsLLLL
Equave	2/1 (1200.0 ¢)
Period	2/1 (1200.0 ¢)
Generator size
Bright	5\19 to 4\15 (315.8 ¢ to 320.0 ¢)
Dark	11\15 to 14\19 (880.0 ¢ to 884.2 ¢)
TAMNAMS information
Related to	4L 3s (smitonic)
With tunings	3:1 to 4:1 (parahard)
Related MOS scales
Parent	4L 11s
Sister	4L 15s
Daughters	19L 15s, 15L 19s
Neutralized	11L 8s
2-Flought	34L 4s, 15L 23s
Equal tunings
Equalized (L:s = 1:1)	5\19 (315.8 ¢)
Supersoft (L:s = 4:3)	19\72 (316.7 ¢)
Soft (L:s = 3:2)	14\53 (317.0 ¢)
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 ¢)
Collapsed (L:s = 1:0)	4\15 (320.0 ¢)

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									L	s	L/s	gen (cents)	comment
4\15									1	0		320.000
								37\139	9	1	9.000	319.424
							33\124		8	1	8.000	319.355
						29\109			7	1	7.000	319.266
					25\94				6	1	6.000	319.149
						46\173			11	2	5.500	319.075
				21\79					5	1	5.000	318.987
					38\143				9	2	4.500	318.881
			17\64						4	1	4.000	318.750
					47\177				11	3	3.667	318.644
				30\113					7	2	3.500	318.584
					43\162				10	3	3.333	318.519
		13\49							3	1	3.000	318.367
				35\132					8	3	2.667	318.182
			22\83						5	2	2.500	318.072
				31\117					7	3	2.333	317.949
					40\151				9	4	2.250	317.881
	9\34								2	1	2.000	317.647
					41\155				9	5	1.800	317.419
				32\121					7	4	1.750	317.355
			23\87						5	3	1.667	317.241
				37\140					8	5	1.600	317.143
		14\53							3	2	1.500	316.981
					47\178				10	7	1.429	316.854
				33\125					7	5	1.400	316.800
			19\72						4	3	1.333	316.667
					43\163				9	7	1.286	316.564
				24\91					5	4	1.250	316.484
					29\110				6	5	1.200	316.364
						34\129			7	6	1.167	316.279
							39\148		8	7	1.143	316.216
								44\167	9	8	1.125	316.168
5\19									1	1	1.000	315.789