Archytas clan

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This is a list showing technical temperament data. For an explanation of what information is shown here, you may look at the technical data guide for regular temperaments.

The archytas clan (or archy family) tempers out the Archytas' comma, 64/63. This means a stack of two 3/2 fifths octave-reduced equals a whole tone of 8/7~9/8 tempered together; two of these tones or equivalently four stacked fifths octave-reduced equal a 9/7 major third. Note the similarity in function to 81/80 in meantone, where four stacked fifths octave-reduced equal a 5/4 major third. This leads to tunings with 3's and 7's quite sharp, such as those of 22edo, 27edo, or 49edo.

This article focuses on rank-2 temperaments. See Archytas family for the rank-3 temperament resulting from tempering out 64/63 alone in the full 7-limit.

Archy

Subgroup: 2.3.7

Comma list: 64/63

Sval mapping[1 0 6], 0 1 -2]]

sval mapping generators: ~2, ~3

Gencom mapping[1 0 0 6], 0 1 0 -2]]

gencom: [2 3; 64/63]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 709.595
error map: 0.000 +7.640 +11.984]
  • POTE: ~2 = 1200.000, ~3/2 = 709.321
error map: 0.000 +7.366 +12.532]

Optimal ET sequence2, 3, 5, 12, 17, 22, 137bdd, 159bddd, 181bbddd

Badness (Sintel): 0.159

Scales: archy5, archy7, archy12

Overview to extensions

7-limit extensions

The second comma in the comma list defines which 7-limit family member we are looking at:

These all use the same generators as archy.

686/675 gives beatles, splitting the fifth in two. 8748/8575 gives immunized, splitting the twelfth in two. 50/49 gives pajara with a semioctave period. 392/375 gives progress, splitting the twelfth in three. 250/243 gives porcupine, splitting the fourth in three. 126/125 gives augene with a 1/3-octave period. 4375/4374 gives modus, splitting the fifth in four. 3125/3024 gives brightstone. 9604/9375 gives fervor. 3125/2916 gives sixix. 3125/3087 gives passion. Those split the generator in five in various ways. 28/27 gives blacksmith with a 1/5-octave period. Finally, 15625/15552 gives catalan, splitting the twelfth in six.

Temperaments discussed elsewhere are:

Considered below are superpyth, quasisuper, ultrapyth, quasiultra, schism, beatles, progress, fervor, and sixix.

Subgroup extensions

Omitting prime 5, archy can be extended to the 2.3.7.11 subgroup by identifying 11/8 as a diminished fourth (C–Gb). This is called supra, given right below. Discussed elsewhere is suhajira of the neutral clan.

Supra

Subgroup: 2.3.7.11

Comma list: 64/63, 99/98

Sval mapping: [1 0 6 13], 0 1 -2 -6]]

Gencom mapping: [1 0 0 6 13], 0 1 0 -2 -6]]

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

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 708.456
  • POTE: ~2 = 1200.000, ~3/2 = 707.192

Optimal ET sequence: 5, 12, 17, 39d, 56d

Badness (Sintel): 0.352

Scales: supra7, supra12

Supraphon

Subgroup: 2.3.7.11.13

Comma list: 64/63, 78/77, 99/98

Sval mapping: [1 0 6 13 18], 0 1 -2 -6 -9]]

Gencom mapping: [1 0 0 6 13 18], 0 1 0 -2 -6 -9]]

gencom: [2 3; 64/63 78/77 99/98]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 707.344
  • POTE: ~2 = 1200.000, ~3/2 = 706.137

Optimal ET sequence: 12f, 17

Badness (Sintel): 0.498

Scales: supra7, supra12

Superpyth

For the 5-limit version, see Syntonic–diatonic equivalence continuum #Superpyth (5-limit).

Superpyth, virtually the canonical extension, adds 245/243 and 1728/1715 to the comma list and can be described as 22 & 27. ~5/4 is found at +9 generator steps, as an augmented second (C–D#). 49edo remains an obvious tuning choice.

Subgroup: 2.3.5.7

Comma list: 64/63, 245/243

Mapping[1 0 -12 6], 0 1 9 -2]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 709.591
error map: 0.000 +7.636 +0.002 +11.993]
  • POTE: ~2 = 1200.000, ~3/2 = 710.291
error map: 0.000 +8.336 +6.305 +10.592]

Optimal ET sequence5, 17, 22, 27, 49, 174bbcddd

Badness (Sintel): 0.818

11-limit

The canonical extension to the 13-limit finds the ~11/8 at +16 generator steps, as a double-augmented second (C–Dx) and finds the ~13/8 at +13 generator steps, as a double-augmented fourth (C–Fx).

Subgroup: 2.3.5.7.11

Comma list: 64/63, 100/99, 245/243

Mapping: [1 0 -12 6 -22], 0 1 9 -2 16]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 709.514
  • POTE: ~2 = 1200.000, ~3/2 = 710.175

Optimal ET sequence: 22, 27e, 49

Badness (Sintel): 0.826

13-limit

Subgroup: 2.3.5.7.11.13

Comma list: 64/63, 78/77, 91/90, 100/99

Mapping: [1 0 -12 6 -22 -17], 0 1 9 -2 16 13]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 709.836
  • POTE: ~2 = 1200.000, ~3/2 = 710.479

Optimal ET sequence: 22, 27e, 49, 76bcde

Badness (Sintel): 1.02

Thomas

Subgroup: 2.3.5.7.11.13

Comma list: 64/63, 100/99, 169/168, 245/243

Mapping: [1 1 -3 4 -6 4], 0 2 18 -4 32 -1]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~16/13 = 354.759
  • POTE: ~2 = 1200.000, ~16/13 = 355.036

Optimal ET sequence: 27e, 44, 71d, 98bde

Badness (Sintel): 2.03

Suprapyth

Suprapyth finds the ~11/8 at the diminished fifth (C–Gb), and finds the ~13/8 at the diminished seventh (C–Bbb).

Subgroup: 2.3.5.7.11

Comma list: 55/54, 64/63, 99/98

Mapping: [1 0 -12 6 13], 0 1 9 -2 -6]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 709.356
  • POTE: ~2 = 1200.000, ~3/2 = 709.495

Optimal ET sequence: 5, 17, 22

Badness (Sintel): 1.08

13-limit

Subgroup: 2.3.5.7.11.13

Comma list: 55/54, 64/63, 65/63, 99/98

Mapping: [1 0 -12 6 13 18], 0 1 9 -2 -6 -9]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 708.702
  • POTE: ~2 = 1200.000, ~3/2 = 708.703

Optimal ET sequence: 5f, 17, 22

Badness (Sintel): 1.50

Quasisuper

Quasisuper can be described as 17c & 22, with the ~5/4 mapped to -13 generator steps, as a double-diminished fifth (C–Gbb).

Subgroup: 2.3.5.7

Comma list: 64/63, 2430/2401

Mapping[1 0 23 6], 0 1 -13 -2]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 708.769
error map: 0.000 +6.814 -0.310 +13.636]
  • POTE: ~2 = 1200.000, ~3/2 = 708.238
error map: 0.000 +6.283 +6.586 +14.697]

Optimal ET sequence17c, 22, 61d

Badness (Sintel): 1.61

Quasisupra

Quasisupra can be viewed as an extension of the excellent 2.3.7.11 temperament supra, with the quasisuper mapping of 5 thrown in, rather than the superpyth mapping of 5 (which results in suprapyth).

Subgroup: 2.3.5.7.11

Comma list: 64/63, 99/98, 121/120

Mapping: [1 0 23 6 13], 0 1 -13 -2 -6]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 708.713
  • POTE: ~2 = 1200.000, ~3/2 = 708.205

Optimal ET sequence: 17c, 22, 39d, 61d

Badness (Sintel): 1.06

13-limit

Subgroup: 2.3.5.7.11.13

Comma list: 64/63, 78/77, 91/90, 121/120

Mapping: [1 0 23 6 13 18], 0 1 -13 -2 -6 -9]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 708.411
  • POTE: ~2 = 1200.000, ~3/2 = 708.004

Optimal ET sequence: 17c, 22, 39d

Badness (Sintel): 1.25

Quasisoup

Subgroup: 2.3.5.7.11

Comma list: 55/54, 64/63, 2430/2401

Mapping: [1 0 23 6 -22], 0 1 -13 -2 16]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 709.043
  • POTE: ~2 = 1200.000, ~3/2 = 709.021

Optimal ET sequence: 22

Badness (Sintel): 2.76

Ultrapyth

Ultrapyth can be viewed as an extension of the excellent 2.3.7.13/5 oceanfront temperament, mapping the ~5/4 to +14 fifths as a double-augmented unison (C–Cx).

Subgroup: 2.3.5.7

Comma list: 64/63, 6860/6561

Mapping[1 0 -20 6], 0 1 14 -2]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 713.218
error map: 0.000 +11.263 -1.264 +4.738]
  • POTE: ~2 = 1200.000, ~3/2 = 713.651
error map: 0.000 +11.696 +4.800 +3.872]

Optimal ET sequence5, 27c, 32, 37

Badness (Sintel): 2.74

11-limit

Subgroup: 2.3.5.7.11

Comma list: 55/54, 64/63, 2401/2376

Mapping: [1 0 -20 6 21], 0 1 14 -2 -11]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 713.282
  • POTE: ~2 = 1200.000, ~3/2 = 713.395

Optimal ET sequence: 5, 32, 37

Badness (Sintel): 2.26

13-limit

Subgroup: 2.3.5.7.11.13

Comma list: 55/54, 64/63, 91/90, 1573/1568

Mapping: [1 0 -20 6 21 -25], 0 1 14 -2 -11 18]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 713.309
  • POTE: ~2 = 1200.000, ~3/2 = 713.500

Optimal ET sequence: 5, 32, 37

Badness (Sintel): 2.03

Ultramarine

Subgroup: 2.3.5.7.11

Comma list: 64/63, 100/99, 3773/3645

Mapping: [1 0 -20 6 -38], 0 1 14 -2 26]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 713.395
  • POTE: ~2 = 1200.000, ~3/2 = 713.791

Optimal ET sequence: 5e, 32e, 37, 79bce

Badness (Sintel): 2.58

13-limit

Subgroup: 2.3.5.7.11.13

Comma list: 64/63, 91/90, 100/99, 847/845

Mapping: [1 0 -20 6 -38 -25], 0 1 14 -2 26 18]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 713.708
  • POTE: ~2 = 1200.000, ~3/2 = 713.811

Optimal ET sequence: 5e, 32e, 37, 79bcef

Badness (Sintel): 1.89

Quasiultra

Quasiultra is to ultrapyth what quasisuper is to superpyth. It is the 27 & 32 temperament, mapping the ~5/4 to -18 fifths as a double diminished sixth (C–Abbb).

Subgroup: 2.3.5.7

Comma list: 64/63, 33614/32805

Mapping[1 0 31 6], 0 1 -18 -2]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 711.838
error map: 0.000 +9.883 +0.608 +7.499]
  • CWE: ~2 = 1200.000, ~3/2 = 711.543
error map: 0.000 +9.588 +5.914 +8.088]

Optimal ET sequence27, 86bd, 113bcd, 140bbcd

Badness (Sintel): 3.34

Schism

Schism tempers out the schisma, mapping the ~5/4 to -8 fifths as a diminished fourth (C–Fb) as does any schismic temperament. 12edo is recommendable tuning, though 29edo (29d val), 41edo (41d val), and 53edo (53dd val) can be used.

Subgroup: 2.3.5.7

Comma list: 64/63, 360/343

Mapping[1 0 15 6], 0 1 -8 -2]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 702.270
error map: 0.000 +0.315 -4.471 +26.635]
  • POTE: ~2 = 1200.000, ~3/2 = 701.556
error map: 0.000 -0.399 +1.237 +28.062]

Optimal ET sequence5c, 7c, 12

Badness (Sintel): 1.43

11-limit

Subgroup: 2.3.5.7.11

Comma list: 45/44, 64/63, 99/98

Mapping: [1 0 15 6 13], 0 1 -8 -2 -6]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~3/2 = 703.383
  • POTE: ~2 = 1200.000, ~3/2 = 702.136

Optimal ET sequence: 5c, 7ce, 12, 29de

Badness (Sintel): 1.24

Beatles

For the 5-limit version, see Miscellaneous 5-limit temperaments #Beatles.

Beatles tempers out 686/675, which may also be characterized by saying it tempers out 2401/2400. It may be described as the 10 & 17c temperament. It splits the fifth into two neutral-third generators of 49/40~60/49; its ploidacot is dicot. 5/4 may be found at -9 generator steps, as a semidiminished fourth (C–Fd). 27edo is an obvious tuning, though 17c-edo and 37edo are among the possibilities.

Beatles extends easily to the no-11 13-limit, as the generator can be interpreted as ~16/13, tempering out 91/90, 169/168, and 196/195.

Subgroup: 2.3.5.7

Comma list: 64/63, 686/675

Mapping[1 1 5 4], 0 2 -9 -4]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~49/40 = 356.634
error map: 0.000 +11.312 +3.984 +4.640]
  • POTE: ~2 = 1200.000, ~49/40 = 355.904
error map: 0.000 +9.853 +10.549 +7.558]

Optimal ET sequence10, 17c, 27, 64b, 91bcd, 118bccd

Badness (Sintel): 1.16

Music

11-limit

Subgroup: 2.3.5.7.11

Comma list: 64/63, 100/99, 686/675

Mapping: [1 1 5 4 10], 0 2 -9 -4 -22]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~49/40 = 356.719
  • POTE: ~2 = 1200.000, ~49/40 = 356.140

Optimal ET sequence: 10e, 17cee, 27e, 64be, 91bcdee

Badness (Sintel): 1.51

13-limit

Subgroup: 2.3.5.7.11.13

Comma list: 64/63, 91/90, 100/99, 169/168

Mapping: [1 1 5 4 10 4], 0 2 -9 -4 -22 -1]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~16/13 = 356.722
  • POTE: ~2 = 1200.000, ~16/13 = 356.229

Optimal ET sequence: 10e, 27e, 37, 64be

Badness (Sintel): 1.25

Ringo

Subgroup: 2.3.5.7.11

Comma list: 56/55, 64/63, 540/539

Mapping: [1 1 5 4 2], 0 2 -9 -4 5]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~11/9 = 355.992
  • POTE: ~2 = 1200.000, ~11/9 = 355.419

Optimal ET sequence: 10, 17c, 27e

Badness (Sintel): 1.09

13-limit

Subgroup: 2.3.5.7.11.13

Comma list: 56/55, 64/63, 78/77, 91/90

Mapping: [1 1 5 4 2 4], 0 2 -9 -4 5 -1]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~11/9 = 356.004
  • POTE: ~2 = 1200.000, ~11/9 = 355.456

Optimal ET sequence: 10, 17c, 27e

Badness (Sintel): 0.935

Beetle

Subgroup: 2.3.5.7.11

Comma list: 55/54, 64/63, 686/675

Mapping: [1 1 5 4 -1], 0 2 -9 -4 15]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~49/40 = 356.694
  • POTE: ~2 = 1200.000, ~49/40 = 356.710

Optimal ET sequence: 10, 27, 37

Badness (Sintel): 1.92

13-limit

Subgroup: 2.3.5.7.11.13

Comma list: 55/54, 64/63, 91/90, 169/168

Mapping: [1 1 5 4 -1 4], 0 2 -9 -4 15 -1]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~16/13 = 356.700
  • POTE: ~2 = 1200.000, ~16/13 = 356.701

Optimal ET sequence: 10, 27, 37

Badness (Sintel): 1.40

Progress

Not to be confused with Progression.
For the 5-limit version, see Miscellaneous 5-limit temperaments #Progress.

Progress tempers out 392/375 and may be described as 15 & 17c. It splits the perfect twelfth into three generators of ~10/7; its ploidacot is alpha-tricot. 32c-edo gives an obvious tuning.

Subgroup: 2.3.5.7

Comma list: 64/63, 392/375

Mapping[1 0 5 6], 0 3 -5 -6]]

mapping generators: ~2, ~10/7

Optimal tunings:

  • CTE: ~2 = 1200.000, ~10/7 = 638.782
error map: 0.000 +14.391 +19.777 -1.518]
  • POTE: ~2 = 1200.000, ~10/7 = 637.878
error map: 0.000 +11.679 +24.297 +3.907]

Optimal ET sequence2, 13, 15, 32c

Badness (Sintel): 1.68

11-limit

Subgroup: 2.3.5.7.11

Comma list: 56/55, 64/63, 77/75

Mapping: [1 0 5 6 4], 0 3 -5 -6 -1]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~10/7 = 638.846
  • POTE: ~2 = 1200.000, ~10/7 = 637.915

Optimal ET sequence: 2, 13, 15, 32c, 47bc

Badness (Sintel): 1.03

13-limit

Subgroup: 2.3.5.7.11.13

Comma list: 56/55, 64/63, 66/65, 77/75

Mapping: [1 0 5 6 4 0], 0 3 -5 -6 -1 7]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~10/7 = 637.871
  • POTE: ~2 = 1200.000, ~10/7 = 637.635

Optimal ET sequence: 15, 17c, 32cf

Badness (Sintel): 1.08

Progressive

Subgroup: 2.3.5.7.11.13

Comma list: 26/25, 56/55, 64/63, 77/75

Mapping: [1 0 5 6 4 9], 0 3 -5 -6 -1 -10]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~10/7 = 637.797
  • POTE: ~2 = 1200.000, ~10/7 = 636.761

Optimal ET sequence: 2f, 15f, 17c

Badness (Sintel): 1.35

Fervor

For the 5-limit version, see Miscellaneous 5-limit temperaments #Fervor.

Fervor tempers out 9704/9375 and may be described as 25 & 27. It splits the 6th harmonic into five generators of ~10/7; its ploidacot is beta-pentacot. 27edo is about as accurate as it can be tuned.

Subgroup: 2.3.5.7

Comma list: 64/63, 9604/9375

Mapping[1 -1 7 8], 0 5 -9 -10]]

mapping generators: ~2, ~10/7

Optimal tunings:

  • CTE: ~2 = 1200.000, ~10/7 = 622.647
error map: 0.000 +11.278 +9.867 +4.709]
  • POTE: ~2 = 1200.000, ~10/7 = 622.224
error map: 0.000 +9.163 +13.673 +8.937]

Optimal ET sequence2, 25, 27

Badness (Sintel): 2.74

11-limit

Subgroup: 2.3.5.7.11

Comma list: 56/55, 64/63, 1350/1331

Mapping: [1 -1 7 8 4], 0 5 -9 -10 -1]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~10/7 = 622.704
  • POTE: ~2 = 1200.000, ~10/7 = 622.150

Optimal ET sequence: 2, 25e, 27e

Badness (Sintel): 1.72

13-limit

Subgroup: 2.3.5.7.11.13

Comma list: 56/55, 64/63, 78/77, 507/500

Mapping: [1 -1 7 8 4 12], 0 5 -9 -10 -1 -16]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~10/7 = 622.626
  • POTE: ~2 = 1200.000, ~10/7 = 621.940

Optimal ET sequence: 2f, 27e

Badness (Sintel): 1.64

Sixix

For the 5-limit version, see Syntonic–chromatic equivalence continuum #Sixix (5-limit).

Sixix tempers out 3125/2916 and may be described as 25 & 32. It is related to the kleismic family in a way similar to the one between meantone and mavila. In both cases the generator is nominally a 6/5 and the complexity to generate major and minor chords is the same, but in sixix it is tuned extremely sharply, to the point where the 3rd and 5th harmonics are reached by going down instead of up, inverting the logic of chord construction. Its ploidacot is gamma-pentacot.

Subgroup: 2.3.5.7

Comma list: 64/63, 3125/2916

Mapping[1 3 4 0], 0 -5 -6 10]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~6/5 = 337.519
error map: 0.000 +10.449 -11.429 +6.366]
  • POTE: ~2 = 1200.000, ~6/5 = 337.442
error map: 0.000 +10.835 -10.965 +5.594]

Optimal ET sequence7, 18d, 25, 32

Badness (Sintel): 4.02

11-limit

Subgroup: 2.3.5.7.11

Comma list: 55/54, 64/63, 125/121

Mapping: [1 3 4 0 6], 0 -5 -6 10 -9]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~6/5 = 337.749
  • POTE: ~2 = 1200.000, ~6/5 = 337.564

Optimal ET sequence: 7, 25e, 32

Badness (Sintel): 2.34

13-limit

Subgroup: 2.3.5.7.11.13

Comma list: 40/39, 55/54, 64/63, 125/121

Mapping: [1 3 4 0 6 4], 0 -5 -6 10 -9 -1]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~6/5 = 337.793
  • POTE: ~2 = 1200.000, ~6/5 = 337.483

Optimal ET sequence: 7, 25e, 32f

Badness (Sintel): 1.91

17-limit

Subgroup: 2.3.5.7.11.13.17

Comma list: 40/39, 55/54, 64/63, 85/84, 125/121

Mapping: [1 3 4 0 6 4 1], 0 -5 -6 10 -9 -1 11]]

Optimal tunings:

  • CTE: ~2 = 1200.000, ~6/5 = 337.629
  • POTE: ~2 = 1200.000, ~6/5 = 337.513

Optimal ET sequence: 7, 25e, 32f

Badness (Sintel): 2.00