Superkleismic

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Shibboleth; superkleismic
Subgroups 2.3.5.7, 2.3.5.7.11, 2.3.5.7.11.19
Comma basis 875/864, 1029/1024 (7-limit);
100/99, 385/384, 441/440 (11-limit);
100/99, 133/132, 190/189, 385/384 (L11.19)
Reduced mapping ⟨1; 9 10 -3 2 14]
Edo join 15 & 26
Generator (CTE) ~5/3 = 878.2 ¢
MOS scales 3L 1s, 4L 3s, 4L 7s, 11L 4s, 15L 11s
Ploidacot wau-enneacot
Pergen (P8, ccP4/9)
Minimax error (7-odd limit) 6.09 ¢;
((L11.19) 21-odd limit) 8.85 ¢
Target scale size (7-odd limit) 41 notes;
((L11.19) 21-odd limit) 56 notes

Superkleismic is a regular temperament defined in the 7-limit such that three 6/5 generators reach 7/4 (tempering out S5/S6 = 875/864, the keema) and such that three 8/7 intervals reach 3/2 (tempering out S7/S8 = 1029/1024, the gamelisma), making it a member of the gamelismic clan and a keemic temperament; its 5-limit comma is 1953125/1889568, the shibboleth comma. It extends extremely easily to the 11-limit as well, by tempering out S10 = 100/99 (as well as 385/384 and 441/440) so that two generators reach 16/11, which also serves to extend the structure of orgone in the 2.7.11 subgroup. Since in superkleismic, the interval 21/20 stands for half 10/9 = 20/19 × 19/18, we can identify 21/20, 20/19, and 19/18 together to add prime 19, tempering out S19 = 361/360 and S20 = 400/399. Superkleismic can also be defined in the 13-limit, where two generators are identified with 13/9 alongside 16/11, tempering out 144/143 and 325/324, and extended to 17 to reach the full 19-limit, based on the equivalence (8/7)2 ~ 17/13 (natural in slendric) and tempering out 273/272 and 833/832 (in addition to 120/119 and 170/169).

The minor-third generator of superkleismic is ~6.3 cents sharp of pure 6/5, even wider than the kleismic minor third (~317 cents), and from this it derives its name. The two mappings unite at 15edo. While not as simple or accurate as kleismic in the 5-limit, it comes into its own as a 7- and 11-limit temperament, approximating both simply and accurately in good tunings. Discarding the harmonics 3 and 5 and concentrating purely on that subgroup gets you orgone. 41edo is a good tuning for superkleismic, with a minor-third generator of 11\41, and mosses of 11 (4L 7s), 15 (11L 4s), or 26 notes (15L 11s) are available.

See Gamelismic clan #Superkleismic for more technical data.

Interval chain

In the following table, odd harmonics and subharmonics 1–21 are bolded.

# Cents* Approximate 11-limit add-19 ratios Full 19-limit extension
0 0.0 1/1
1 321.8 6/5
2 643.6 16/11, 36/25 13/9, 19/13
3 965.4 7/4, 33/19 26/15, 30/17
4 87.3 20/19, 19/18, 21/20, 22/21 18/17
5 409.1 14/11, 19/15, 24/19 34/27
6 730.9 32/21, 38/25 20/13, 26/17
7 1052.7 11/6 24/13
8 174.5 10/9, 11/10, 21/19 19/17
9 496.3 4/3, 33/25
10 818.2 8/5
11 1140.0 35/18, 48/25, 64/33 52/27
12 261.8 7/6, 22/19 20/17
13 583.6 7/5 24/17
14 905.4 32/19, 42/25, 56/33 22/13
15 27.2 49/48, 55/54, 56/55, 64/63 40/39
16 349.1 11/9 16/13
17 670.9 22/15, 28/19, 40/27
18 992.7 16/9, 44/25
19 114.5 16/15 14/13
20 436.3 32/25 22/17
21 768.1 14/9 80/51
22 1080.0 28/15 32/17
23 201.8 28/25 44/39
24 523.6 49/36
25 845.4 44/27 28/17, 64/39
26 1167.2 49/25, 88/45, 160/81 128/65

* in L11.19 CWE tuning

Tunings

Tuning spectrum

Edo
Generators
Unchanged interval
(eigenmonzo)
*
Generator (¢) Comments
6/5 315.641 Untempered tuning
4\15 320.000 Lower bound of 7- through (L11.19) 21-odd-limit diamond monotone
22/21 320.134
11/10 320.626
24/19 320.888
21/20 321.117 1/4-keema
19\71 321.127
22/19 321.150
11/6 321.338
22/15 321.356
8/5 321.369 5-odd-limit minimax, 1/10-shibboleth comma
15\56 321.429
32/21 321.537
32/19 321.606
26\97 321.649
21/19 321.658
16/15 321.670 2/19-shibboleth comma
11/9 321.713
7/5 321.732 7- and 11- through (L11.19) 21-odd-limit minimax
37\138 321.739 138e val
28/19 321.842
28/15 321.844
19/15 321.849
11\41 321.951 Upper bound of (L11.19) 15- through 21-odd-limit diamond monotone
4/3 322.005 9-odd-limit minimax, 1/9-shibboleth comma
14/9 322.139
20/19 322.200
7/6 322.239
18\67 322.388 67ch val
10/9 322.800 1/8-shibboleth comma
7/4 322.942 1/3-keema
7\26 323.077 Upper bound of 7-, 9-, and 11-odd-limit diamond monotone
19/18 323.401
14/11 323.502
16/11 324.341

* besides the octave