Fractional-octave temperaments

All temperaments on this page have a fractional-octave period, such as 1\26, 1\31, or 1\41.

Temperaments discussed elsewhere include:

• 1\2 period temperaments
  • Diaschismic temperaments
  • Vishnuzmic temperaments
  • Jubilismic temperaments
  • Varunismic temperaments
  • Lokismic temperaments
• 1\3 period temperaments
  • Augmented temperaments
  • Misty temperaments
  • Landscape temperaments
• 1\4 period temperaments
  • Diminished temperaments
  • Undim temperaments
• 1\5 period temperaments
  • Pental temperaments
  • Qintosec temperaments
  • Trisedodge temperaments
  • Cloudy temperaments
  • Limmic temperaments
• 1\6 period temperaments
  • Hexe
  • Sextile
  • Stearnscape
• Akjaysmic temperaments (1\7 period)
  • Brahmagupta
  • Septant
  • Whitewood
  • Sevond
  • Neutron
• Octoid, octant (1\8 period)
• Tritrizo temperaments (1\9 period)
  • Ennealimmal
  • Niner
  • Enneaportent
  • Novemkleismic
• Linus temperaments (1\10 period)
  • Decoid
  • Deca
  • Decic
  • Decistearn
  • Decal
  • Decavish
  • Decimetra
• Hendecatonic, undeka (1\11 period)
• Compton, atomic (1\12 period)
• Triskaidekic, tridecatonic, trideci (1\13 period)
• Pentadecal, quindecic (1\15 period)
• Hexadecoid, sedecic (1\16 period)
• Chlorine (1\17 period)
• Hemiennealimmal (1\18 period)
• Enneadecal, meanmag (1\19 period)
• Degrees (1\20 period)
• Akjayland (1\21 period)
• Icosidillic (1\22 period)
• Icositritonic (1\23 period)
• Hours (1\24 period)
• Bosonic (1\26 period)
• Trinealimmal, cobalt (1\27 period)
• Oquatonic (1\28 period)
• Mystery (1\29 period)
• Birds (1\31 period)
• Decades (1\36 period)
• Hemienneadecal (1\38 period)
• Counterpyth temperaments (1\41 period)
• Meridic (1\43 period)
• Palladium (1\46 period)
• Mercator temperaments (1\53 period)
• Omicronbeta (1\72 period)
• Octogintic (1\80 period)
• Garistearn (1\94 period)
• Undecentic (1\99 period)
• Schisennealimmal (1\171 period)
• Lunennealimmal (1\441 period)

14th-octave temperaments

While 14edo is poor in LCJI harmonics, some of its multiples (such as 224edo and 742edo) are members of zeta edo list.

Silicon

The name of silicon temperament comes from the 14th element. Defined upwards to the 13-limit. In 742edo, what's also unique is that it is generated by a 53edo fifth intermingled with 14edo periods.

5-limit

Subgroup: 2.3.5

Comma list: [-145 112 -14⟩

Mapping generators: ~282429536481/268435456000, ~3/2

Mapping: [⟨14 14 -33], ⟨0 1 8]]

Optimal tuning (CTE): ~3/2 = 701.864

7-limit

Subgroup: 2.3.5.7

Comma list: 14348907/14336000, 56358560858112/56296884765625

Mapping generators: ~6125/5832, ~3/2

Mapping: [⟨14 14 -33 113], ⟨0 1 8 -9]]

Optimal tuning (CTE): ~3/2 = 701.870

11-limit

Subgroup: 2.3.5.7.11

Comma list: 9801/9800, 1240029/1239040, 2359296/2358125

Mapping generators: ~605/576, ~3/2

Mapping: [⟨14 14 -33 113 73], ⟨0 1 8 -9 -3]]

Optimal tuning (CTE): ~3/2 = 701.872

13-limit

Subgroup: 2.3.5.7.11.13

Comma list: 4096/4095, 9801/9800, 67392/67375, 59535/59488

Mapping generators: ~104/99, ~3/2

Mapping: [⟨14 14 -33 113 73 60], ⟨0 1 8 -9 -3 -1]]

Optimal tuning (CTE): ~3/2 = 701.873

Vals: 70d, 224, 294, 448, 518, 672, 742, 966, 1190, 1260

37th-octave temperaments

37edo is accurate for harmonics 5, 7, 11, and 13, so various 37th-octave temperaments actually make sense.

Rubidium

The name of rubidium temperament comes from Rubidium, the 37th element.

Subgroup: 2.3.5.7

Comma list: 3136/3125, 4194304/4117715

Mapping: [⟨37 0 86 104], ⟨0 1 0 0]]

Mapping generators: ~50/49, ~3

Optimal tuning (POTE): ~3/2 = 703.3903

Badness: 0.312105

11-limit

Subgroup: 2.3.5.7.11

Comma list: 176/175, 1375/1372, 65536/65219

Mapping: [⟨37 0 86 104 128], ⟨0 1 0 0 0]]

Optimal tuning (POTE): ~3/2 = 703.0355

Optimal GPV sequence: Template:Val list

Badness: 0.101001

13-limit

Subgroup: 2.3.5.7.11.13

Comma list: 176/175, 640/637, 847/845, 1375/1372

Mapping: [⟨37 0 86 104 128 137], ⟨0 1 0 0 0 0]]

Optimal tuning (POTE): ~3/2 = 703.0520

Optimal GPV sequence: Template:Val list

Badness: 0.048732

Triacontaheptoid

Subgroup: 2.3.5.7

Comma list: 244140625/242121642, 283115520/282475249

Mapping: [⟨37 2 67 85], ⟨0 3 1 1]]

Mapping generator: ~50/49, ~24000/16807

Optimal tuning (CTE): ~24000/16807 = 612.4003

Badness: 0.784746

11-limit

Subgroup: 2.3.5.7.11

Comma list: 1375/1372, 4000/3993, 226492416/226474325

Mapping: [⟨37 2 67 85 128], ⟨0 3 1 1 0]]

Optimal tuning (CTE): ~768/359 = 612.4003

Optimal GPV sequence: Template:Val list

Badness: 0.167327

13-limit

Subgroup: 2.3.5.7.11.13

Comma list: 625/624, 1375/1372, 4000/3993, 15379/15360

Mapping: [⟨37 2 67 85 128 118], ⟨0 3 1 1 0 1]]

Optimal tuning (CTE): ~462/325 = 612.4206

Optimal GPV sequence: Template:Val list

Badness: 0.076183

17-limit

Subgroup: 2.3.5.7.11.13.17

Comma list: 625/624, 715/714, 1225/1224, 4000/3993, 11271/11264

Mapping: [⟨37 2 67 85 128 118 189], ⟨0 3 1 1 0 1 -2]]

Optimal tuning (CTE): ~121/85 = 612.4187

Optimal GPV sequence: Template:Val list

Badness: 0.052475

65th-octave temperaments

65edo is accurate for harmonics 3, 5, and 11, so various 65th-octave temperaments actually make sense.

Terbium

The name of terbium temperament comes from Terbium, the 65th element.

Subgroup: 2.3.5.7

Comma list: 32805/32768, 78732/78125

Mapping: [⟨65 103 151 0], ⟨0 0 0 1]]

Mapping generators: ~81/80, ~7

Optimal tuning (POTE): ~7/4 = 969.1359

Badness: 0.169778

11-limit

Subgroup: 2.3.5.7.11

Comma list: 243/242, 4000/3993, 5632/5625

Mapping: [⟨65 103 151 0 225], ⟨0 0 0 1 0]]

Optimal tuning (POTE): ~7/4 = 969.5715

Optimal GPV sequence: Template:Val list

Badness: 0.059966

13-limit

Subgroup: 2.3.5.7.11.13

Comma list: 243/242, 351/350, 2080/2079, 3584/3575

Mapping: [⟨65 103 151 0 225 58], ⟨0 0 0 1 0 1]]

Optimal tuning (POTE): ~7/4 = 969.9612

Optimal GPV sequence: Template:Val list

Badness: 0.036267

91st-octave temperaments

Protactinium

Protactinium is described as the 364 & 1547 temperament and named after the 91st element.

Subgroup: 2.3.5.7.11.13

Comma list: 4096/4095, 91125/91091, 369754/369603, 2912000/2910897

Mapping: [⟨91 0 644 -33 1036 481], ⟨0 1 -3 -2 -5 -1]]

Mapping generators: ~1728/1715, ~3

Optimal tuning (CTE): ~3/2 = 702.0195

Optimal GPV sequence: Template:Val list

Badness: 0.0777

17-limit

Subgroup: 2.3.5.7.11.13.17

Comma list: 4096/4095, 14400/14399, 42500/42471, 75735/75712, 2100875/2100384

Mapping: [⟨91 0 644 -33 1036 481 -205], ⟨0 1 -3 -2 -5 -1 4]]

Optimal tuning (CTE): ~3/2 = 702.0269

Optimal GPV sequence: Template:Val list

Badness: 0.0582

118th-octave temperaments

118edo is accurate for harmonics 3 and 5, so various 118th-octave temperaments actually make sense.

Parakleischis

118edo and its multiples are members of both parakleismic and schismic, and from this it derives its name.

Subgroup: 2.3.5.7

Comma list: 32805/32768, 1224440064/1220703125

Mapping: [⟨118 187 274 0], ⟨0 0 0 1]]

Mapping generators: ~15625/15552, ~7

Optimal tuning (POTE): ~7/4 = 968.7235

Badness: 0.145166

11-limit

Subgroup: 2.3.5.7.11

Comma list: 9801/9800, 32805/32768, 137781/137500

Mapping: [⟨118 187 274 0 77], ⟨0 0 0 1 1]]

Optimal tuning (POTE): ~7/4 = 968.5117

Optimal GPV sequence: Template:Val list

Badness: 0.049316

Oganesson

Named after the 118th element, since a simpler temperament was already named. 82 periods plus a generator correspond to 13/8.

Subgroup: 2.3.5.7.11

Comma list: 32805/32768, 151263/151250, 1224440064/1220703125

Mapping: [⟨118 187 274 0 -420], ⟨0 0 0 2 5]]

Mapping generators: ~15625/15552, ~405504/153125

Optimal tuning (CTE): ~202752/153125 = 484.4837

Optimal GPV sequence: Template:Val list

Badness: 0.357

13-limit

Subgroup: 2.3.5.7.11.13

Comma list: 1716/1715, 32805/32768, 34398/34375, 384912/384475

Mapping: [⟨118 187 274 0 -420 271], ⟨0 0 0 2 5 1]]

Optimal tuning (CTE): ~8125/6144 = 484.4867

Optimal GPV sequence: Template:Val list

Badness: 0.122