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3L 2s (3/2-equivalent)

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Scale structure
Step pattern LLsLs
sLsLL
Equave 3/2 (702.0 ¢)
Period 3/2 (702.0 ¢)
Generator size(edf)
Bright 3\5 to 2\3 (421.2 ¢ to 468.0 ¢)
Dark 1\3 to 2\5 (234.0 ¢ to 280.8 ¢)
Related MOS scales
Parent 2L 1s⟨3/2⟩
Sister 2L 3s⟨3/2⟩
Daughters 5L 3s⟨3/2⟩, 3L 5s⟨3/2⟩
Neutralized 1L 4s⟨3/2⟩
2-Flought 8L 2s⟨3/2⟩, 3L 7s⟨3/2⟩
Equal tunings(edf)
Equalized (L:s = 1:1) 3\5 (421.2 ¢)
Supersoft (L:s = 4:3) 11\18 (429.0 ¢)
Soft (L:s = 3:2) 8\13 (432.0 ¢)
Semisoft (L:s = 5:3) 13\21 (434.5 ¢)
Basic (L:s = 2:1) 5\8 (438.7 ¢)
Semihard (L:s = 5:2) 12\19 (443.3 ¢)
Hard (L:s = 3:1) 7\11 (446.7 ¢)
Superhard (L:s = 4:1) 9\14 (451.3 ¢)
Collapsed (L:s = 1:0) 2\3 (468.0 ¢)

3L 2s<3/2> (sometimes called uranian), is a fifth-repeating MOS scale. The notation "<3/2>" means the period of the MOS is 3/2, disambiguating it from octave-repeating 3L 2s. The name of the period interval is called the sesquitave (by analogy to the tritave). It is a warped diatonic scale because it has one extra small step compared to diatonic (3L 1s (fifth-equivalent)): for example, the Ionian diatonic fifth LLsL can be distorted to the Oberonan mode LsLLs.

The generator range is 234 to 280.8 cents, placing it in between the diatonic major second and the diatonic minor third, usually representing a subminor third of some type (like 7/6). The bright (chroma-positive) generator is, however, its fifth complement (468 to 421.2 cents).

Because uranian is a fifth-repeating scale, each tone has a 3/2 perfect fifth above it. The scale has three major chords and two minor chords, all voiced so that the third of the triad is an octave higher, a tenth. Uranian also has two harmonic 7th chords.

Basic uranian is in 8edf, which is a very good fifth-based equal tuning similar to 88cET.

Notation

There are 2 main ways to notate the uranian scale. One method uses a simple sesquitave (fifth) repeating notation consisting of 5 naturals (A-E). Given that 1-7/4-5/2 is fifth-equivalent to a tone cluster of 1-10/9-7/6, it may be more convenient to notate uranian scales as repeating at the double sesquitave (major ninth), however it does make navigating the genchain harder. This way, 7/4 is its own pitch class, distinct from 7/6. Notating this way produces a major ninth which is the Aeolian mode of Annapolis[6L 4s]. Since there are exactly 10 naturals in double sesquitave notation, Greek numerals 1-10 may be used.

Notation Supersoft Soft Semisoft Basic Semihard Hard Superhard
Uranian Annapolis 18edf 13edf 21edf 8edf 19edf 11edf 14edf
A# Α# 1\18

38.9975

1\13

53.9965

2\21

66.8529

1\8

87.7444

3\19

110.835

2\11

[[1]]

3\14

[[2]]

Bb Βb 3\18

[[3]]

2\13

[[4]]

3\21

[[5]]

2\19

73.89

1\11

63.814

1\14

50.1396

B Β 4\18

155.99

3\13

[[6]]

5\21

[[7]]

2\8

175.48875

5\19

184.725

3\11

[[8]]

4\14

[[9]]

B# Β# 5\18

[[10]]

4\13

[[11]]

7\21

[[12]]

3\8

[[13]]

8\19

295.56

5\11

319.07045

7\14

[[14]]

Cb Γb 6\18

233.985

6\21

[[15]]

2\8

175.48875

4\19

147.78

2\11

[[16]]

2\14

[[17]]

C Γ 7\18

[[18]]

5\13

[[19]]

8\21

[[20]]

3\8

[[21]]

7\19

258.615

4\11

[[22]]

5\14

[[23]]

C# Γ# 8\18

311.98

6\13

[[24]]

10\21

[[25]]

4\8

[[26]]

9\19

332.505

6\11

382.88455

8\14

[[27]]

Db Δb 10\18

389.975

7\13

[[28]]

11\21

[[29]]

10\19

369.45

5\11

319.07045

6\14

[[30]]

D Δ 11\18

[[31]]

8\13

[[32]]

13\21

[[33]]

5\8

[[34]]

12\19

470.285

7\11

[[35]]

9\14

[[36]]

D# Δ# 12\18

467.97

9\13

[[37]]

15\21

[[38]]

6\8

526.46625

15\19

554.175

9\11

[[39]]

12\14

[[40]]

Eb Εb 14\18

545.965

10\13

[[41]]

16\21

[[42]]

14\19

516.23

8\11

[[43]]

10\14

[[44]]

E Ε 15\18

[[45]]

11\13

[[46]]

18\21

[[47]]

7\8

[[48]]

17\19

628.065

10\11

[[49]]

13\14

[[50]]

E# Ε# 16\18

622.96

12\13

[[51]]

20\21

[[52]]

8\8

701.955

20\19

738.9

12\11

765.769

16\14

[[53]]

Ab Ϛb/Ϝb 17\18

[[54]]

19\21

[[55]]

7\8

[[56]]

16\19

591.12

9\11

[[57]]

11\14

551.636

A Ϛ/Ϝ 701.955
A# Ϛ#/Ϝ# 19\18

[[58]]

14\13

[[59]]

23\21

[[60]]

9\8

[[61]]

22\19

812.79

13\11

[[62]]

17\14

[[63]]

Bb Ζb 21\18

[[64]]

15\13

[[65]]

24\21

[[66]]

21\19

775.845

12\11

765.769

15\14

[[67]]

B Ζ 22\18

857.945

16\13

[[68]]

26\21

[[69]]

10\8

877.44375

24\19

886.68

14\11

[[70]]

18\14

[[71]]

B# Ζ# 23\18

[[72]]

17\13

[[73]]

28\21

[[74]]

11\8

[[75]]

27\19

997.515

16\11

1021.02545

21\14

1052.9235

Cb Ηb 24\18

935.94

27\21

[[76]]

10\8

877.44375

23\19

849.753

13\11

[[77]]

16\14

[[78]]

C Η 25\18

[[79]]

18\13

[[80]]

29\21

[[81]]

11\8

[[82]]

26\19

960.57

15\11

[[83]]

19\14

[[84]]

C# Η# 26\18

1012.935

19\13

1025.9342

31\21

1036.2193

12\8

1052.9235

29\19

1071.405

17\11

1084.83955

22\14

1103.0721

Db Θb 28\18

1091.93

20\13

1079.9308

32\21

1069.9157

28\19

1034.46

16\11

1021.02545

20\14

1002.7929

D Θ 29\18

1130.9275

21\13

1133.9273

34\21

1136.4986

13\8

1140.7769

31\19

1145.295

18\11

1148.6536

23\14

1153.2118

D# Θ# 30\18

1169.925

22\13

1187.9238

36\21

1203.3514

14\8

1228.42125

34\19

1256.13

20\11

1276.2818

26\14

1303.6307

Eb Ιb 32\18

1247.92

23\13

1241.9203

37\21

1236.7779

33\19

1218.285

19\11

1212.5678

24\14

1203.3514

E Ι 33\18

1286.9175

24\13

1295.9169

39\21

1303.6307

15\8

1316.1656

36\19

1330.02

21\11

1340.0959

27\14

1353.8704

E# Ι# 34\18

1323.915

25\13

1348.9135

41\21

1370.4836

16\8

1403.91

39\19

1440.855

23\11

1468.724

30\14

1504.1892

Ab Αb 35\18

1364.9125

40\21

1337.0571

15\8

1316.1656

35\19

1293.075

20\11

1276.2818

25\14

1253.591

A Α 1403.91

Intervals

Generators Sesquitave notation Interval category name Generators Notation of 3/2 inverse Interval category name
The 5-note MOS has the following intervals (from some root):
0 A perfect unison 0 A sesquitave (just fifth)
1 C perfect mosthird (min third) -1 D perfect mosfourth (maj third)
2 Eb minor mosfifth -2 B major mossecond
3 Bb minor mossecond -3 E major mosfifth
4 Db diminished mosfourth -4 C# augmented mosthird
The chromatic 8-note MOS also has the following intervals (from some root):
5 Ab diminished sesquitave -5 A# augmented unison (chroma)
6 Cb diminished mosthird -6 D# augmented mosfourth
7 Ebb diminished mosfifth -7 B# augmented mossecond

Genchain

The generator chain for this scale is as follows:

Bbb Ebb Cb Ab Db Bb Eb C A D B E C# A# D# B# E#
d2 d5 d3 d6 d4 m2 m5 P3 P1 P4 M2 M5 A3 A1 A4 A2 A5

Modes

The mode names are based on the major satellites of Uranus, in order of size:

Mode Scale UDP Interval type (mos-)
name pattern notation 2nd 3rd 4th 5th
Titanian LLsLs 4|0 M A P M
Oberonan LsLLs 3|1 M P P M
Umbrielan LsLsL 2|2 M P P m
Arielan sLLsL 1|3 m P P m
Mirandan sLsLL 0|4 m P d m

Temperaments

The most basic rank-2 temperament interpretation of uranian is semiwolf, which has 4:7:10 chords spelled root-(p+1g)-(3p-2g) (p = 3/2, g = the approximate 7/6). The name "semiwolf" comes from two 7/6 generators approximating a 27/20 wolf fourth. This is further extended to the 11-limit in two interpretations: semilupine where 2 major mos2nds (LL) equal 11/9, and hemilycan where 1 major and 2 minor mos2nds (sLs) equal 11/9. Basic 8edf fits both extensions.

Semiwolf

Subgroup: 3/2.7/4.5/2

Comma list: 245/243

POL2 generator: ~7/6 = [[85]]

Mapping: [⟨1 1 3], ⟨0 1 -2]]

Vals: Template:Val list

Semilupine

Subgroup: 3/2.7/4.5/2.11/4

Comma list: 245/243, 100/99

POL2 generator: ~7/6 = [[86]]

Mapping: [⟨1 1 3 4], ⟨0 1 -2 -4]]

Vals: Template:Val list

Hemilycan

Subgroup: 3/2.7/4.5/2.11/4

Comma list: 245/243, 441/440

POL2 generator: ~7/6 = [[87]]

Mapping: [⟨1 1 3 1], ⟨0 1 -2 4]]

Vals: Template:Val list

Scale tree

The spectrum looks like this:

Generator

(bright)

Cents L s L/s Comments
Chroma-positive Chroma-negative
3\5 421.173 280.782 1 1 1.000 Equalised
11\18 428.973 272.983 4 3 1.333
8\13 431.972 269.983 3 2 1.500 Semiwolf and Semilupine start here
13\21 435.084 266.871 5 3 1.667
5\8 438.722 263.233 2 1 2.000 Semilupine ends, Hemilycan begins
12\19 443.34 258.615 5 2 2.500
7\11 446.699 255.256 3 1 3.000 Semiwolf and Hemilycan end here
9\14 451.257 250.698 4 1 4.000 Near 24edo
2\3 467.97 233.985 1 0 → inf Paucitonic
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