2L 1s

← 1L 1s	2L 1s	3L 1s →
↙ 1L 2s	↓ 2L 2s	3L 2s ↘

┌╥╥┬┐ │║║││ │││││ └┴┴┴┘
Scale structure
Step pattern	LLs sLL
Equave	2/1 (1200.0 ¢)
Period	2/1 (1200.0 ¢)
Generator size
Bright	1\3 to 1\2 (400.0 ¢ to 600.0 ¢)
Dark	1\2 to 2\3 (600.0 ¢ to 800.0 ¢)
Related MOS scales
Parent	1L 1s
Sister	1L 2s
Daughters	3L 2s, 2L 3s
Neutralized	1L 2s
2-Flought	5L 1s, 2L 4s
Equal tunings
Equalized (L:s = 1:1)	1\3 (400.0 ¢)
Supersoft (L:s = 4:3)	4\11 (436.4 ¢)
Soft (L:s = 3:2)	3\8 (450.0 ¢)
Semisoft (L:s = 5:3)	5\13 (461.5 ¢)
Basic (L:s = 2:1)	2\5 (480.0 ¢)
Semihard (L:s = 5:2)	5\12 (500.0 ¢)
Hard (L:s = 3:1)	3\7 (514.3 ¢)
Superhard (L:s = 4:1)	4\9 (533.3 ¢)
Collapsed (L:s = 1:0)	1\2 (600.0 ¢)

2L 1s is a 2/1-equivalent (octave-equivalent) moment of symmetry scale containing 2 large steps and 1 small step, repeating every octave. Generators that produce this scale range from 400 ¢ to 600 ¢, or from 600 ¢ to 800 ¢. Scales of this form are always proper because there is only one small step.

2L 1s is one of two halves in the tree of strict MOSes, the other being 1L 2s. 2L 1s is the parent MOS of the pentic scale 2L 3s, which is itself the parent of the diatonic and antidiatonic scales, as well as the antipentic scale 3L 2s, which is itself the parent of the oneirotonic and checkertonic scales.

Names

TAMNAMS uses the name trial.

Modes

Scale degrees of the modes of 2L 1s

UDP	Cyclic order	Step pattern	Scale degree (mosdegree)
			0	1	2	3
2|0	1	LLs	Perf.	Perf.	Aug.	Perf.
1|1	2	LsL	Perf.	Perf.	Perf.	Perf.
0|2	3	sLL	Perf.	Dim.	Perf.	Perf.

Intervals

Intervals of 2L 1s

Intervals			Steps subtended	Range in cents
Generic	Specific	Abbrev.
0-mosstep	Perfect 0-mosstep	P0ms	0	0.0 ¢
1-mosstep	Diminished 1-mosstep	d1ms	s	0.0 ¢ to 400.0 ¢
	Perfect 1-mosstep	P1ms	L	400.0 ¢ to 600.0 ¢
2-mosstep	Perfect 2-mosstep	P2ms	L + s	600.0 ¢ to 800.0 ¢
	Augmented 2-mosstep	A2ms	2L	800.0 ¢ to 1200.0 ¢
3-mosstep	Perfect 3-mosstep	P3ms	2L + s	1200.0 ¢

See also

• More detailed scale tree: Triad 2L 1s