Octagar temperaments
This is a collection of temperaments tempering out the octagar comma, [5 -4 3 -2⟩ = 4000/3969.
Temperaments discussed elsewhere include:
- Ripple, {36/35, 2560/2401} → Ripple family
- Nautilus, {49/48, 250/243} → Porcupine family
- Injera, {50/49, 81/80} → Meantone family
- Augene, {64/63, 126/125} → Augmented family
- Garibaldi, {225/224, 3125/3087} → Schismatic family
- Octacot, {245/243, 2401/2400} → Tetracot family
- Roman, {525/512, 3125/3024} → Wesley family and Avicennmic temperaments
- Superkleismic, {875/864, 1029/1024} → Shibboleth family and Gamelismic clan
- Quartonic, {1728/1715, 4000/3969} → Orwellismic temperaments
- Bidia, {2048/2025, 3136/3125} → Diaschismic family
- Hamity, {2430/2401, 4000/3969} → Amity family
- Hemikleismic, {4000/3969, 6144/6125} → Kleismic family
- Pluto, {4000/3969, 10976/10935} → Mirkwai clan
- Quintupole, {4000/3969, 458752/455625} → Quintaleap family
Considered below are slendi and slithy.
Slendi
Subgroup: 2.3.5.7
Comma list: 4000/3969, 84035/82944
Mapping: [⟨1 2 3 3], ⟨0 -17 -28 -8]]
Wedgie: ⟨⟨ 17 28 8 5 -35 -60 ]]
POTE generator: ~49/48 = 29.181
Optimal ET sequence: 41, 206, 247bc, 288bcd, 329bcd
Badness: 0.142903
11-limit
Subgroup: 2.3.5.7.11
Comma list: 100/99, 245/242, 46656/46585
Mapping: [⟨1 2 3 3 4], ⟨0 -17 -28 -8 -22]]
POTE generator: ~49/48 = 29.180
Badness: 0.063217
13-limit
Subgroup: 2.3.5.7.11.13
Comma list: 100/99, 144/143, 245/242, 343/338
Mapping: [⟨1 2 3 3 4 4], ⟨0 -17 -28 -8 -22 -1]]
POTE generator: ~49/48 = 29.125
Optimal ET sequence: 41, 124ef, 165ef
Badness: 0.043644
Slithy
Subgroup: 2.3.5.7
Comma list: 4000/3969, 420175/419904
Mapping: [⟨1 3 5 4], ⟨0 -19 -36 -16]]
Wedgie: ⟨⟨ 19 36 16 13 -28 -64 ]]
POTE generator: ~21/20 = 89.282
Optimal ET sequence: 27, 94, 121, 215, 336d
Badness: 0.107482
11-limit
Subgroup: 2.3.5.7.11
Comma list: 540/539, 2200/2187, 4375/4356
Mapping: [⟨1 3 5 4 8], ⟨0 -19 -36 -16 -61]]
POTE generator: ~21/20 = 89.291
Optimal ET sequence: 94, 121, 215, 336de, 551bde
Badness: 0.045895
13-limit
Subgroup: 2.3.5.7.11.13
Comma list: 325/324, 352/351, 540/539, 1575/1573
Mapping: [⟨1 3 5 4 8 4], ⟨0 -19 -36 -16 -61 -4]]
POTE generator: ~21/20 = 89.286
Optimal ET sequence: 94, 121, 215, 336def
Badness: 0.028492
Tridecatonic
The tridecatonic temperament (26&39) has a period of 1/13 octave. It tempers out the tridecalimma, [-11 26 -13⟩ in the 5-limit. There are some extensions for 7-limit, including tridecatonic (26&39d, tempering out 4000/3969), trideci (26&39, tempering out 4375/4374), and bosonic (26&130, tempering out 321489/320000).
Subgroup: 2.3.5.7
Comma list: 4000/3969, 8748/8575
Mapping: [⟨13 21 31 37], ⟨0 -1 -2 -1]]
POTE generator: ~3/2 = 701.9605
Optimal ET sequence: 26, 39d, 65d
Badness: 0.139213
11-limit
Subgroup: 2.3.5.7.11
Comma list: 99/98, 1944/1925, 2560/2541
Mapping: [⟨13 21 31 37 45], ⟨0 -1 -2 -1 0]]
POTE generator: ~3/2 = 701.7028
Optimal ET sequence: 26, 39d, 65d
Badness: 0.063257
13-limit
Subgroup: 2.3.5.7.11.13
Comma list: 99/98, 144/143, 275/273, 1040/1029
Mapping: [⟨13 21 31 37 45 49], ⟨0 -1 -2 -1 0 -2]]
POTE generator: ~3/2 = 701.3573
Optimal ET sequence: 26, 39df, 65d
Badness: 0.037851