Wollemia

Revision as of 11:17, 18 May 2026 by Lucius Chiaraviglio (talk | contribs) (Expand a little bit: add the additional 7-limit comma)

The wollemia temperament is one of the 7-limit extensions of tetracot, the 5-limit temperament tempering out the tetracot comma (20000/19683), and is naturally a full 13-limit temperament.

Wollemia
Subgroups 2.3.5.7, 2.3.5.7.11, 2.3.5.7.11.13
Comma basis 126/125, 2240/2187 (7-limit);
56/55, 100/99, 243/242 (11-limit)
56/55, 91/90, 100/99, 243/242
(13-limit)
Reduced mapping ⟨1; 4 9 19 10 -2]
ET join 27e & 34
Generators (CWE) ~10/9 = 177.1 ¢
MOS scales 6L 1s, 7L 6s, 7L 13s, 7L 20s
Ploidacot tetracot
Minimax error 9-odd-limit: 14.5 ¢;
13-odd-limit: 21.7 ¢
Target scale size 9-odd-limit: 20 notes;
13-odd-limit: 27 notes

In addition to the tetracot comma, wollemia tempers out 126/125, making it a starling temperament.

Todo: expand

Interval chain

# Cents* Approximate ratios
0 0.00 1/1
1 177.23 10/9, 11/10
2 354.46 11/9, 16/13
3 531.69 15/11
4 708.92 3/2
5 886.16 5/3
6 1063.39 11/6, 24/13, 28/15
7 40.62 40/39, 45/44, 55/54
8 217.85 9/8
9 395.08 5/4, 14/11
10 572.31 7/5, 11/8, 18/13
11 749.54 14/9, 20/13
12 926.77 22/13
13 1104.01 15/8
14 81.24 25/24, 27/26
15 258.47 7/6, 15/13
16 435.70
17 612.93
18 790.16
19 967.39 7/4
20 1144.62
21 121.86 14/13

* In 13-limit POTE tuning, octave reduced

Tunings

Tuning spectrum

Eigenmonzo
(Unchanged-interval)
Generator (¢) Comments
11/10 165.004
11/9 173.704
12/11 174.894
11/8 175.132
4/3 175.489
13/11 175.899
16/15 176.021
5/4 176.257 5-odd-limit minimax
18/13 176.338
15/13 176.516
6/5 176.872
13/10 176.890
13/12 176.905
8/7 177.307 7-, 9-, 11-, 13- and 15-odd-limit minimax
14/13 177.538
7/6 177.791
7/5 178.251
9/7 178.629
15/11 178.984
14/11 179.723
16/13 179.736
15/14 180.093
10/9 182.404