Xenharmonic Wiki

5L 2s/Temperaments

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User:IlL/Template:RTT notice Below are some important rank-2 temperaments with optimal generator size in the diatonic (5L 2s) range (the period is always 1\1 for temperaments with this MOS structure). The temperaments are listed following the 5L 2s scale tree, in order of increasing generator size. The top-level temperaments are the most important and obvious divisions in diatonic tunings. Child temperaments are higher-complexity extensions of low-complexity parent temperaments, with new JI readings for intervals further out in the generator chain. These are finer adjustments of the major, parent temperaments, thus are less useful when the composer chooses not to use a long generator chain in the music.

Meantone (12&19, 2.3.5)

Main article: Meantone

Period: 1\1

Optimal (POTE) generator: ~3/2 = 696.239

EDO generators: 7\12, 11\19, 18\31, 25\43, 29\50

Scales (Scala files): Meantone5, Meantone7, Meantone12

Interval table (7-note MOS, 2.3.5.7 POTE tuning)
# Cents[1] Approximate ratios[2]
0 0.00 1/1
1 696.2 3/2
2 192.5 9/8, 10/9
3 888.7 5/3
4 385.0 5/4
5 1081.2 15/8
6 577.4 25/18
  1. ↑ octave-reduced
  2. ↑ 2.3.5, odd limit ≤ 27

Comma list: 81/80

Mapping: [⟨1 0 -4], ⟨0 1 4]]

Mapping generators: ~2, ~3

Wedgie: ⟨⟨1 4 4]]

Tuning ranges:

  • valid range: [685.714, 720.000] (7 to 5)
  • nice range: [694.786, 701.955] (1/3 comma to Pythagorean)
  • strict range: [694.786, 701.955]

Optimal ET sequence: 5, 7, 12, 19, 31, 50, 81, 131b, 212bb, 293bb

Badness: 0.00736

Flattone (19&26, 2.3.5.7.13)

Period: 1\1

Optimal (POTE) generator: ~3/2 = 693.7498

EDO generators: 11\19, 15\26, 26\45, 37\64

Scales (Scala files): Flattone12

Interval table (12-note MOS, 2.3.5.7.13 POTE tuning)
#Gens up Cents [1] Approximate ratios[2]
0 0.00 1/1
1 693.7 3/2
2 187.5 9/8, 10/9
3 881.2 5/3
4 375.0 5/4, 16/13
5 1068.7 15/8, 24/13
6 562.5 18/13
7 56.2
8 750.0 20/13
9 243.7 8/7
10 937.5 12/7
11 431.2 9/7
  1. ↑ octave-reduced
  2. ↑ 2.3.5.7.13, odd limit ≤ 27

Comma list: 81/80, 525/512

Mapping: [⟨1 0 -4 17], ⟨0 1 4 -9]]

Mapping generators: ~2, ~3

Wedgie: ⟨⟨1 4 -9 4 -17 -32]]

Minimax tuning:

[[1 0 0 0⟩, [21/13 0 1/13 -1/13⟩, [32/13 0 4/13 -4/13⟩, [32/13 0 -9/13 9/13⟩]
Eigenmonzos: 2, 7/5
[[1 0 0 0⟩, [17/11 2/11 0 -1/11⟩, [24/11 8/11 0 -4/11⟩, [34/11 -18/11 0 9/11⟩]
Eigenmonzos: 2, 9/7

Tuning ranges:

  • valid range: [692.308, 694.737] (26 to 19)
  • nice range: [692.353, 701.955]
  • strict range: [692.353, 694.737]

Algebraic generator: Squarto, the positive root of 8x2 - 4x - 9, at 506.3239 cents, equal to (1 + sqrt (19))/4.

Optimal ET sequence: 7, 19, 26, 45

Badness: 0.0386

Septimal meantone (19&12, 2.3.5.7)

Period: 1\1

Optimal (POTE) generator: 696.495

EDO generators: 7\12, 11\19, 18\31, 25\43, 29\50

Scales (Scala files): Meantone5, Meantone7, Meantone12

Interval table (12-note MOS, 2.3.5.7 POTE tuning)
#Gens up Cents [1] Approximate ratios[2]
0 0.00 1/1
1 696.5 3/2
2 193.0 9/8, 10/9
3 889.5 5/3
4 386.0 5/4
5 1082.5 15/8, 28/15
6 579.0 7/5
7 75.5 21/20, 25/24, 28/27
8 772.0 14/9, 25/16
9 268.5 7/6
10 965.0 7/4
11 461.4 21/16
  1. ↑ octave-reduced
  2. ↑ 2.3.5.7, odd limit ≤ 27

Comma list: 81/80, 126/125

Mapping: [⟨1 0 -4 -13], ⟨0 1 4 10]]

Mapping generators: ~2, ~3

Wedgie: ⟨⟨1 4 10 4 13 12]]

Minimax tuning:

[[1 0 0 0⟩, [1 0 1/4 0⟩, [0 0 1 0⟩, [-3 0 5/2 0⟩]
Eigenmonzos: 2, 5

Tuning ranges:

  • valid range: [694.737, 700.000] (19 to 12)
  • nice range: [694.786, 701.955]
  • strict range: [694.786, 700.000]

Algebraic generator: Cybozem, the real root of 15x3 - 10x2 - 18, which comes to 503.4257 cents. The recurrence converges quickly.

Optimal ET sequence: 12, 19, 31, 81, 112b, 143b

Badness: 0.0137

Meanpop (31&50, 2.3.5.7.11)

Period: 1\1

Optimal (POTE) generator: ~3/2 = 696.434

EDO generators: 29\50, 40\69, 47\81

Mapping: Same as septimal meantone, plus -13 gens = 11/8

Comma list: 81/80, 126/125, 385/384

Mapping: [⟨1 0 -4 -13 24], ⟨0 1 4 10 -13]]

Mapping generator: ~2, ~3

Minimax tuning:

[[1 0 0 0 0⟩, [1 0 1/4 0 0⟩, [0 0 1 0 0⟩, [-3 0 5/2 0 0⟩, [11 0 -13/4 0 0⟩]
Eigenmonzos: 2, 5

Tuning ranges:

  • valid range: [694.737, 696.774] (19 to 31)
  • nice range: [691.202, 701.955]
  • strict range: [694.737, 696.774]

Algebraic generator: Cybozem; or else Radieubiz, the real root of 3x3 + 6x - 19. Unlike Cybozem, the recurrence for Radieubiz does not converge.

Optimal ET sequence: 12e, 19, 31, 81

Badness: 0.0215

Huygens (31&43, 2.3.5.7.11)

Period: 1\1

Optimal (POTE) generator: ~3/2 = 696.967

EDO generators: 25\43, 43\74

Mapping: Same as septimal meantone, plus 18 gens = 11/8

Comma list: 81/80, 126/125, 99/98

Mapping: [⟨1 0 -4 -13 -25], ⟨0 1 4 10 18]]

Mapping generators: ~2, ~3

Minimax tuning:

[[1 0 0 0 0⟩, [25/16 -1/8 0 0 1/16⟩, [9/4 -1/2 0 0 1/4⟩, [21/8 -5/4 0 0 5/8⟩, [25/8 -9/4 0 0 9/8⟩]
Eigenmonzos: 2, 11/9

Tuning ranges:

  • valid range: [696.774, 700.000] (31 to 12)
  • nice range: [691.202, 701.955]
  • strict range: [696.774, 700.000]

Algebraic generator: Traverse, the positive real root of x4 + 2x - 13, or 696.9529 cents.

Optimal ET sequence: 12, 19e, 31, 105, 136b, 167be, 198be

Badness: 0.0170

Schismic (41&53, 2.3.5.7.11.13.19)

Period: 1\1

Optimal (POTE) generator: ~3/2 = 702.1044

EDO generators: 24\41, 31\53, 55\94

Scales: Garibaldi12, Garibaldi17

Interval table (29-note MOS, 2.3.5.7.11.13.19 POTE tuning)
#Gens up Cents [1] Approximate ratios[2]
0 0.00 1/1
1 702.10 3/2
2 204.21 9/8
3 906.31 27/16, 32/19
4 408.42
5 1110.52
6 612.63 10/7
7 114.73 15/14, 16/15
8 816.84 8/5
9 318.94 6/5
10 1021.04 9/5
11 523.15 27/20
12 25.25 81/80
13 727.36 32/21
14 229.462 8/7
15 931.57 12/7
16 433.67 9/7
17 1135.77 54/28
18 637.88 13/9
19 139.98 13/12
20 842.09 13/8
21 344.19 11/9, 39/32
22 1046.30 11/6
23 548.40 11/8, 26/19
24 50.51 33/32
25 752.61
26 254.714 22/19
27 956.82 26/15
28 458.92 13/10
  1. ↑ octave-reduced
  2. ↑ 2.3.5.7.11.13.19

Comma list: 225/224, 275/273, 325/324, 385/384, 513/512

Mapping: [⟨1 0 15 25 -33 -28 9], ⟨0 1 -8 -14 23 20 -3]]

Mapping generators: ~2, ~3

Template:Val list

Parapyth (29&17, 2.3.7.11.13)

Period: 1\1

Optimal (POTE) generator: ~3/2 = 704.745

EDO generators: 10\17, 17\29, 27\46

Interval table (17-note MOS, 2.3.7.11.13 POTE tuning)
#Gens up Cents [1] Approximate ratios[2]
0 0.00 1/1
1 704.7 3/2
2 209.5 9/8
3 914.2 22/13
4 419.0 14/11
5 1123.7
6 628.5 13/9, (23/16)
7 133.2 13/12, 14/13
8 838.0 13/8
9 342.7 11/9
10 1047.5 11/6
11 552.2 11/8
12 56.9 28/27
13 761.7 14/9
14 266.4 7/6
15 971.2 7/4
16 475.9 21/16
  1. ↑ octave-reduced
  2. ↑ 2.3.7.11.13, odd limit ≤ 27

Period-generator mapping: [<1 0 -21 -14 -9|, <0 1 15 11 8|]

Commas: 169/168, 352/351, 364/363

Gencom: [2 3/2; 169/169 352/351 364/363]

Gencom mapping: [<1 1 0 -6 -3 -1|, <0 1 0 15 11 8|]

EDOs: 17, 46, 63

RMS error: 0.7541 cents

Archy (17&5, 2.3.7)

Period: 1\1

Optimal (POTE) generator: ~3/2 = 709.321

EDO generators: 10\17, 13\22, 16\27

Scales: Archy5, Archy7, Archy12

Interval table (7-note MOS, 2.3.7 POTE tuning)
#Gens up Cents [1] Approximate ratios[2]
0 0.00 1/1
1 709.3 3/2
2 218.6 9/8, 8/7
3 927.8 12/7
4 437.3 9/7
5 1146.6 27/14
6 655.9
  1. ↑ octave-reduced
  2. ↑ 2.3.7, odd limit ≤ 27

Period-generator mapping: [<1 2 2|, <0 -1 2|]

Comma: 64/63

Gencom: [2 3/2; 64/63]

Gencom mapping: [<1 1 0 4|, <0 1 0 -2|]

EDOs: 5, 12, 17, 22, 27, 137bc

RMS error: 1.856 cents

Supra (17&22, 2.3.7.11)

Period: 1\1

Optimal (POTE) generator: ~3/2 = 707.192

EDO generators: 10\17, 13\22, 23\39

Scales: Supra7, Supra12

Interval table (12-note MOS, 2.3.7.11 POTE tuning)
#Gens up Cents [1] Approximate ratios[2]
0 0.00 1/1
1 707.2 3/2
2 214.4 9/8, 8/7
3 921.6 12/7
4 428.8 9/7, 14/11
5 1136.0 27/14
6 643.2 16/11
7 150.3 12/11
8 857.5 18/11
9 364.7
10 1071.9
11 579.1
  1. ↑ octave-reduced
  2. ↑ 2.3.7.11, odd limit ≤ 27

Period-generator mapping: [<1 0 6 13|, <0 1 -2 -6|]

Commas: 64/63, 99/98

Gencom: [2 3/2; 64/63 99/98]

Gencom mapping: [<1 1 0 4 7|, <0 1 0 -2 -6|]

EDOs: 5, 12, 17, 39c, 56c

RMS error: 1.977 cents

Superpyth (22&27, 2.3.5.7)

Period: 1\1

Optimal (POTE) generator: ~3/2 = 710.291

EDO generators: 13\22, 18\27, 31\49

Interval table (12-note MOS, 2.3.5.7 POTE tuning)
#Gens up Cents [1] Approximate ratios[2]
0 0.00 1/1
1 710.3 3/2
2 220.6 9/8, 8/7
3 930.9 12/7
4 441.2 9/7
5 1151.5
6 661.7 40/27
7 172.0 10/9
8 882.3 5/3
9 392.6 5/4
10 1102.9 15/8
11 613.2 10/7
  1. ↑ octave-reduced
  2. ↑ 2.3.5.7, odd limit ≤ 27

Period-generator mapping: [<1 0 -12 6|, <0 1 9 -2|]

Commas: 64/63, 245/243

Wedgie: ⟨⟨1 9 -2 12 -6 -30]]

EDOs: 5, 17, 22, 27, 49

Badness: 0.0323

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