1L 2s

	↑1L 1s	2L 1s↗
	1L 2s	2L 2s→
	↓1L 3s	2L 3s↘

Brightest mode	Lss
Period	2/1
Range for bright generator	2\3 (800¢) to 1\1 (1200¢)
Range for dark generator	0\1 (0¢) to 1\3 (400¢)
Parent MOS	1L 1s
Sister MOS	2L 1s
Daughter MOSes	3L 1s, 1L 3s
Equal tunings
Supersoft (L:s = 4:3)	7\10 (840¢)
Soft (L:s = 3:2)	5\7 (857.1¢)
Semisoft (L:s = 5:3)	8\11 (872.7¢)
Basic (L:s = 2:1)	3\4 (900¢)
Semihard (L:s = 5:2)	7\9 (933.3¢)
Hard (L:s = 3:1)	4\5 (960¢)
Superhard (L:s = 4:1)	5\6 (1000¢)

1L 2s is a moment of symmetry scale consisting of 1 large step and 2 small steps, repeating every octave. This scale is made using a generator ranging from 800¢ to 1200¢, or from 0¢ to 400¢.

This MOS is the parent of tetric (3L 1s) and antetric (1L 3s), the former being the parent of mosh (3L 4s) and smitonic (4L 3s), and the latter being the predecessor of other MOS scales such as semiquartal (5L 4s), gramitonic (4L 5s), and other 1L ns MOS scales.

Names

TAMNAMS uses the name antrial.

Modes

UDP	Step pattern
2|0	Lss
1|1	sLs
0|2	ssL

Scale tree

Bright generator (in steps)	Cents	L	s	L/s	Comments
2\3	800	1	1	1	Equalized 1L 2s
11\16	825	6	5	1.2
9\13	830.769	5	4	1.25
16\23	834.783	9	7	1.286
7\10	840	4	3	1.333	Supersoft 1L 2s
19\27	844.444	11	8	1.375
12\17	847.059	7	5	1.4
17\24	850	10	7	1.429
5\7	857.143	3	2	1.5	Soft 1L 2s
18\25	864	11	7	1.571
13\18	866.667	8	5	1.6
21\29	868.966	13	8	1.625
8\11	872.727	5	3	1.667	Semisoft 1L 2s
19\26	876.923	12	7	1.714
11\15	880	7	4	1.75
14\19	884.211	9	5	1.8
3\4	900	2	1	2	Basic 1L 2s
13\17	917.647	9	4	2.25
10\13	923.077	7	3	2.333
17\22	927.273	12	5	2.4
7\9	933.333	5	2	2.5	Semihard 1L 2s
18\23	939.13	13	5	2.6
11\14	942.857	8	3	2.667
15\19	947.368	11	4	2.75
4\5	960	3	1	3	Hard 1L 2s
13\16	975	10	3	3.333
9\11	981.818	7	2	3.5
14\17	988.235	11	3	3.667
5\6	1000	4	1	4	Superhard 1L 2s
11\13	1015.38	9	2	4.5
6\7	1028.57	5	1	5
7\8	1050	6	1	6
1\1	1200	1	0	→ ∞	Collapsed 1L 2s