No-twos subgroup temperaments
(WIP, catalog of 3.5.7 subgroup rank two temperaments will eventually be redirected here)
This is a collection of subgroup temperaments which omit the prime harmonic of 2. Because of the absence of octaves, these are all nonoctave scales using a period of a tritave, or if harmonic 3 is also excluded, 5/1.
Overview by mapping of 5
Classified by focusing on the mapping of 5th harmonic, similar to Rank-2 temperaments by mapping of 3.
- Arcturus, Aldebaran and Polaris have a 3/1 period and ~5/3 generator. There is one-to-one correspondence between the 3.5 subgroup and mapped intervals.
- BPS has a ~9/7 generator, two of which give the ~5/3.
- Sirius has a ~25/21 generator, three of which give the ~5/3.
- Deneb has a ~11/9 generator, three of which give the ~9/5.
- Canopus has a ~7/5 generator, five of which give the ~27/5 (9/5 up a tritave).
- Alnilam has a ~81/55 generator, ten of which give the ~243/5 (9/5 up three tritaves).
- Izar has a ~16807/10125 generator, twelve of which give the ~2187/5 (9/5 up five tritaves).
- Nekkar has a ~16807/10935 generator, sixteen of which give the ~6561/5 (9/5 up six tritaves).
- Mintaka does not include the 5th harmonic, and has an ~11/7 generator, two of which give the ~27/11, and three of which give the ~27/7 (9/7 and a tritave).
- Antipyth and Juggernaut use 5/1 as a period, and have a ~7/5 generator. There is one-to-one correspondence between the 5.7 subgroup and mapped intervals.
3.5.7 subgroup temperaments
Arcturus
As for extensions of this temperament that include the prime 2, see opossum, crepuscular, catalan, bunya, bohpier, and superkleismic.
Subgroup: 3.5.7
Comma list: 15625/15309
Sval mapping: [⟨1 0 -7], ⟨0 1 6]]
Sval mapping generators: ~3, ~5
POTE generator: ~5/3 = 878.042
Optimal ET sequence: b2, b11, b13
Polturus
This extension of Arcturus adds Polaris's mapping for 11/9, mapping it to 5 generators down.
Subgroup: 3.5.7.11
Comma list: 15625/15309, 177147/171875
Gencom: [3/1 5/3; 15625/15309 177147/171875]
Mapping: [⟨1 1 -1 5], ⟨0 1 6 -6]]
POTE generator: ~5/3 = 884.268
EDTs: 15, 13e, 28e, 43dee
BPS
For extensions to this temperament that include the prime 2, see Sensamagic clan. No-twos extensions will be documented below.
Subgroup: 3.5.7
Comma list: 245/243
Sval mapping: [⟨1 1 2], ⟨0 -2 1]]
Sval mapping generators: ~3, ~9/7
Optimal tuning (POTE): ~3 = 1\1edt, ~9/7 = 440.4881
Optimal ET sequence: b4, b9, b13, b56, b69, b82, b95
Badness (Sintel): 0.066
Mintra
This temperament splits 27/7 (the BPS generator up a tritave) into three by means of 11/7, and is the intersection of BPS, Deneb, and Mintaka temperaments as well as the most natural temperament satisfied in the 3.5.7.11 subgroup in 39edt.
Subgroup: 3.5.7.11
Comma list: 245/243, 1331/1323
Sval mapping: [⟨1 5 0 1], ⟨0 -6 3 2]]
Sval mapping generators: ~3, ~21/11
Optimal tuning (CWE): ~3 = 1\1edt, ~11/7 = 780.752
Supporting ETs: 39, 17, 56, 22, 5, 95, 12, 61, 73, 134, 27c, 151e, 100, 90
Badness (Sintel): 0.302
Dubhe
This temperament is a simple 3.5.7.17 weak extension of BPS that splits the generator of 9/7 into two intervals of 17/15. The name was suggested by MidnightBlue after Dubhe, a bright double star (the ninth brightest) and similarities to the word "double".
Subgroup: 3.5.7.17
Comma list: 245/243, 2025/2023
Sval mapping: [⟨1 1 2 2], ⟨0 4 -2 3]]
Optimal tuning (CWE): ~3 = 1\1edt, ~17/15 = 220.142
Supporting ETs: 26, 9, 17, 43, 69, 8, 35, 95, 61, 60, 121, 25g, 112, 44
Badness (Sintel): 0.177
Canopus
For extensions to this temperament that include the prime 2, see Mirkwai clan. No-twos extensions will be documented below.
Subgroup: 3.5.7
Comma list: 16875/16807
Sval mapping: [⟨1 3 3], ⟨0 -5 -4]]
Sval mapping generators: ~3, ~7/5
Optimal ET sequence: b13, b62, b75, b88, b101, b114, b355, b469, b583, b697
Izar
Subgroup: 3.5.7
Comma list: 13841287201/13839609375
Sval mapping: [⟨1 7 5], ⟨0 -12 -7]]
Sval mapping generators: ~3, ~16807/10125
Optimal tuning (CTE): ~3 = 1\1edt, ~16807/10125 = 877.280
Supporting ETs: b13, b11cd, b193, b15cd, b180, b24c, b167, b37c, b154, 141, b50c, b28cd, b128, b63c
Nekkar
This temperament is the no-twos restriction of squares, and as such is named after a star that belonged to the obsolete constellation of Quadrans Muralis, whose name has to do with squares.
Subgroup: 3.5.7
Comma list: 35303692060125/33232930569601
Sval mapping: [⟨1 8 3], ⟨0 -16 -3]]
Sval mapping generators: ~3, ~16807/10935
Optimal tuning (CWE): ~3 = 1\1edt, ~16807/10935 = 776.767
Supporting ETs: 22, 49, 5c, 71, 27, 17c, 120, 93, 76c, 32cc, 169d, 115, 191d, 164d
3.5.7.11 subgroup
See also Mintaka.
This continues the canonical 11-limit extension of squares.
Subgroup: 3.5.7.11
Comma list: 1331/1323, 120285/117649
Sval mapping: [⟨1 8 3 3], ⟨0 -16 -3 -2]]
Sval mapping generators: ~3, ~11/7
Optimal tuning (CWE): ~3 = 1\1edt, ~11/7 = 776.781
Supporting ETs: 22, 49, 71, 5c, 27, 120, 93, 17c, 76c, 169d, 191d, 115, 164d, 125cd
3.5.7.11.19 subgroup
Subgroup: 3.5.7.11.19
Comma list: 1045/1029, 1331/1323, 6561/6517
Sval mapping: [⟨1 8 3 3 -1], ⟨0 -16 -3 -2 9]]
Sval mapping generators: ~3, ~11/7
Optimal tuning (CWE): ~3 = 1\1edt, ~11/7 = 776.959
Supporting ETs: 22, 71, 49, 27, 93, 115
Sirius
For an overview of extensions to this temperament that include prime 2, see Gariboh clan#Overview to extensions.
Subgroup: 3.5.7
Comma list: 3125/3087
Sval mapping: [⟨1 1 1], ⟨0 3 5]]
- sval mapping generators: ~3, ~25/21
Optimal tuning (POTE): ~3 = 1\1edt, ~25/21 = 293.740
Optimal ET sequence: b6, b7, b13, b71, b84, b97, b110, b123, b136
3.5.11 subgroup temperaments
Polaris
Polaris tempers out the comma 177147/171875, and thus equates 7 5/3's with 15/11, or equivalently 7 9/5's with 11/9.
Subgroup: 3.5.11
Comma list: 177147/171875
Gencom: [3/1 5/3; 177147/171875]
Sval mapping: [⟨1 2 1], ⟨0 1 -6]]
POTE generator: ~5/3 = 892.6
EDTs: 17, 15, 32, 49, 13[+11], 47, 19, 11[+11], 81, 66, 79[+11], 62[+11], 28[+11], 21[-11]
Deneb
Subgroup: 3.5.11
Comma list: 6655/6561
Gencom: [3/1 11/9; 6655/6561]
Sval mapping: [⟨1 2 2], ⟨0 -3 1]]
POTE generator: ~11/9 = 340.242
EDTs: 28, 11, 17, 6, 39, 5, 67, 45, 50, 16, 23, 73, 61, 62
Alnilam
Effectively a microtemperament, Alnilam takes a generator of an 81/55 flat fifth and equates 9 of them with 11/9. The name was given by CompactStar to continue with the theme of naming no-twos temperaments after proper star names, but also to indirectly reference mavila.
Subgroup: 3.5.11
Comma list: [0 -35 9 0 10⟩
Gencom: [3/1 81/55; [0 -35 9 0 10⟩]
Sval mapping: [⟨1 5 -1], ⟨0 -10 9]]
CTE generator: ~81/55 = 672.410
EDTs: 99, 17, 82, 116, 181, 65, 14[-5], 280, 48, 215, 31, 133, 314, 263
Other tritave-based subgroups
Aldebaran
Subgroup: 3.5.13
Comma list: 3159/3125
Sval mapping: [⟨1 0 5], ⟨0 1 -2]]
Supporting ETs: 15, 17, 13, 32, 47, 28, 11[-13], 19[+13], 43, 9[-13], 7[-13], 49[+13], 21[+13], 41[-13]
CTE generator: ~5/3 = 887.76
Mintaka
Subgroup: 3.7.11
Comma list: 1331/1323
Sval mapping: [⟨1 0 1], ⟨0 3 2]]
Sval mapping generators: ~3, ~21/11
Supporting ETs: b22, b5, b17, b39, b12, b61, b27, b7, b83, b49, b56, b32, b29, b100
No-twos-or-threes subgroup temperaments
Antipyth
Subgroup: 5.7.11
Comma list: 859375/823543
Sval mapping: [⟨1 2 7], ⟨0 1 7]]
Mapping generators: ~5, ~7/25
Optimal tuning (CTE): ~5 = 1\1ed5, ~7/5 = 592.728
Supporting ETs: c14, c5, c19, c33, c47, c9e, c61, c75, c23e, c24e, c52e, c80e, c89e, c37e
Juggernaut
Subgroup: 5.7.11
Comma list: 125/121
Sval mapping: [⟨2 4 3], ⟨0 1 0]]
Mapping generators: ~11/5, ~7/25
Optimal tuning (CTE): ~11/5 = 1\2ed5, ~7/5 = 582.512
Supporting ETs: c14, c10, c6, c18, c24, c22, c32, c16, c38, c8d, c34, c26d, c46, c52e
Tridecimal juggernaut
Subgroup: 5.7.11.13
Comma list: 125/121, 637/625
Sval mapping: [⟨2 4 3 0], ⟨0 1 0 -2]]
Mapping generators: ~11/5, ~7/25
Optimal tuning (CTE): ~11/5 = 1\2ed5, ~7/5 = 582.512
Supporting ETs: c10, c14, c6, c24, c34, c16f, c44, c18f, c38, c26f, c54, c64
Graphs
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Complexity vs. damage plot. z<1 corresponds to the "Middle Path" inclusion criterion. |
Projective tuning space diagrams
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Temperaments with smaller commas, labeled by name |
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Temperaments with smaller commas, labeled by comma |
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Temperaments with larger commas, labeled by name |
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Temperaments with larger commas, labeled by comma |
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Both sets, labeled by name |
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Both sets, labeled by comma |
11.675 |