17th-octave temperaments

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.

Fractional-octave temperaments

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← 16th-octave • 17th-octave • 18th-octave →

17edo is a "wheel" for some fractional-octave temperaments. The most notable relationship is the tempering out of the septendecima, the amount by which seventeen 25/24 chromatic semitones exceed an octave.

Gothic

The gothic temperament is associated with the 17-comma. It used to be known as septendecic.

It can be extended to the higher limits using the identical mapping to 17et in the no-5 subgroups. While this comes at the cost of greater error for primes 7 and 11, it is the only strong extension for these primes that makes practical sense.

Subgroup: 2.3.5

Comma list: 134217728/129140163

Mapping: [⟨17 27 0], ⟨0 0 1]]

mapping generators: ~256/243, ~5

Optimal tunings:

• WE: ~256/243 = 70.5152 ¢, ~5/4 = 388.7908 ¢

error map: ⟨-1.241 +1.956 -0.006]

• CWE: ~256/243 = 70.5882 ¢, ~5/4 = 388.2315 ¢

error map: ⟨0.000 +3.927 +1.918]

Optimal ET sequence: 17c, 34, 323bbcc, 357bbcc, 391bbcc

Badness (Sintel): 12.7

7-limit

Subgroup: 2.3.5.7

Comma list: 64/63, 17496/16807

Mapping: [⟨17 27 0 48], ⟨0 0 1 0]]

Optimal tunings:

• WE: ~28/27 = 70.4030 ¢, ~5/4 = 392.5654 ¢

error map: ⟨-3.149 -1.075 -0.047 +10.517]

• CWE: ~28/27 = 70.5882 ¢, ~5/4 = 391.7654 ¢

error map: ⟨0.000 +3.927 +5.452 +19.409]

Optimal ET sequence: 17c, 34d, 85cdd

Badness (Sintel): 3.44

11-limit

Subgroup: 2.3.5.7.11

Comma list: 64/63, 99/98, 243/242

Mapping: [⟨17 27 0 48 59], ⟨0 0 1 0 0]]

Optimal tunings:

• WE: ~28/27 = 70.3922 ¢, ~5/4 = 392.9298 ¢
• CWE: ~28/27 = 70.5882 ¢, ~5/4 = 392.4722 ¢

Optimal ET sequence: 17c, 34d, 85cdde

Badness (Sintel): 1.77

13-limit

Subgroup: 2.3.5.7.11.13

Comma list: 64/63, 78/77, 99/98, 144/143

Mapping: [⟨17 27 0 48 59 63], ⟨0 0 1 0 0 0]]

Optimal tunings:

• WE: ~27/26 = 70.4103 ¢, ~5/4 = 392.3109 ¢
• CWE: ~27/26 = 70.5882 ¢, ~5/4 = 392.1288 ¢

Optimal ET sequence: 17c, 34d

Badness (Sintel): 1.35

Chlorine

Chlorine has a period of 1/17 octave. It tempers out [-52 -17 34⟩, the septendecima, by which 17 classical chromatic semitones ((25/24)¹⁷) exceed an octave. This temperament can be described as 289 & 323 temperament, which tempers out [-49 4 22 -3⟩ as well as the ragisma. Not only the semitwelfth, but also the ~5/4 can be used as a generator.

The name of this temperament comes from chlorine, the 17th element, and has no relation to the chlorisma.

Subgroup: 2.3.5

Comma list: [-52 -17 34⟩

Mapping: [⟨17 0 26], ⟨0 2 1]]

mapping generators: ~25/24, ~[26 9 -17⟩

Optimal tunings:

• WE: ~25/24 = 70.5887 ¢, ~[26 9 -17⟩ = 950.9807 ¢

error map: ⟨+0.008 +0.006 -0.027]

• CWE: ~25/24 = 70.5882 ¢, ~[26 9 -17⟩ = 950.9776 ¢

error map: ⟨0.000 -0.000 -0.042]

Optimal ET sequence: 34, 153, 187, 221, 255, 289, 323, 612, 3349, 3961, 4573, 5185, 5797

Badness (Sintel): 1.81

7-limit

Subgroup: 2.3.5.7

Comma list: 4375/4374, [-49 4 22 -3⟩

Mapping: [⟨17 0 26 -87], ⟨0 2 1 10]]

Optimal tunings:

• WE: ~25/24 = 70.5880 ¢, ~[24 -5 -9 2⟩ = 950.9962 ¢

error map: ⟨-0.004 +0.037 -0.030 -0.019]

• CWE: ~25/24 = 70.5882 ¢, ~[24 -5 -9 2⟩ = 950.9990 ¢

error map: ⟨0.000 +0.043 -0.021 -0.013]

Optimal ET sequence: 289, 323, 612, 935, 1547, 3706, 5253

Badness (Sintel): 1.05

11-limit

Subgroup: 2.3.5.7.11

Comma list: 4375/4374, 41503/41472, 1879453125/1879048192

Mapping: [⟨17 0 26 -87 207], ⟨0 2 1 10 -11]]

Optimal tunings:

• WE: ~25/24 = 70.5905 ¢, ~693/400 = 951.0054 ¢
• CWE: ~25/24 = 70.5882 ¢, ~693/400 = 950.9754 ¢

Optimal ET sequence: 289, 323, 612, 3349de, 3961de, …, 5797ddee

Badness (Sintel): 2.11