76edo

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Revision as of 21:57, 9 March 2023 by CompactStar (talk | contribs) (Adding interval list auto-generated by a program I wrote)
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← 75edo 76edo 77edo →
Prime factorization 22 × 19
Step size 15.7895 ¢ 
Fifth 44\76 (694.737 ¢) (→ 11\19)
Semitones (A1:m2) 4:8 (63.16 ¢ : 126.3 ¢)
Dual sharp fifth 45\76 (710.526 ¢)
Dual flat fifth 44\76 (694.737 ¢) (→ 11\19)
Dual major 2nd 13\76 (205.263 ¢)
Consistency limit 7
Distinct consistency limit 7

Template:EDO intro

Theory

Approximation of odd harmonics in 76edo
Harmonic 3 5 7 9 11 13 15 17 19 21 23
Error Absolute (¢) -7.22 -7.37 -5.67 +1.35 +1.31 -3.69 +1.20 +5.57 +2.49 +2.90 +3.30
Relative (%) -45.7 -46.7 -35.9 +8.6 +8.3 -23.3 +7.6 +35.3 +15.8 +18.4 +20.9
Steps
(reduced)
120
(44)
176
(24)
213
(61)
241
(13)
263
(35)
281
(53)
297
(69)
311
(7)
323
(19)
334
(30)
344
(40)

This tuning's 5-limit patent val is contorted in the 5-limit, reflecting the fact that 76 = 4 * 19. In the 7-limit it tempers out 2401/2400 as well as 81/80, and so supports squares temperament. In the 11-limit, it tempers out 245/242 and 385/384, and supports the 24&26 temperament. In the 13-limit, it tempers out 105/104, 144/143, 351/350 and 364/363. While the 44\76 = 11\19 fifth is already flat, the 43\76 fifth, even flatter, is an almost perfect approximation to the hornbostel temperament POTE fifth, whereas its sharp fifth, 45\76, makes for an excellent superpyth fifth. Hence you can do hornbostel/mavila, squares/meantone, and superpyth all with the same equal division.

Using non-patent vals, 76edo provides an excellent tuning for teff temperament, a low complexity, medium accuracy, and high limit (17 or 19) temperament.

Intervals

# Cents Diatonic interval category
0 0.0 perfect unison
1 15.8 superunison
2 31.6 superunison
3 47.4 subminor second
4 63.2 subminor second
5 78.9 subminor second
6 94.7 minor second
7 110.5 minor second
8 126.3 supraminor second
9 142.1 neutral second
10 157.9 neutral second
11 173.7 submajor second
12 189.5 major second
13 205.3 major second
14 221.1 supermajor second
15 236.8 supermajor second
16 252.6 ultramajor second
17 268.4 subminor third
18 284.2 minor third
19 300.0 minor third
20 315.8 minor third
21 331.6 supraminor third
22 347.4 neutral third
23 363.2 submajor third
24 378.9 submajor third
25 394.7 major third
26 410.5 major third
27 426.3 supermajor third
28 442.1 ultramajor third
29 457.9 ultramajor third
30 473.7 subfourth
31 489.5 perfect fourth
32 505.3 perfect fourth
33 521.1 superfourth
34 536.8 superfourth
35 552.6 superfourth
36 568.4 low tritone
37 584.2 low tritone
38 600.0 high tritone
39 615.8 high tritone
40 631.6 high tritone
41 647.4 subfifth
42 663.2 subfifth
43 678.9 subfifth
44 694.7 perfect fifth
45 710.5 perfect fifth
46 726.3 superfifth
47 742.1 ultrafifth
48 757.9 ultrafifth
49 773.7 subminor sixth
50 789.5 minor sixth
51 805.3 minor sixth
52 821.1 supraminor sixth
53 836.8 supraminor sixth
54 852.6 neutral sixth
55 868.4 submajor sixth
56 884.2 major sixth
57 900.0 major sixth
58 915.8 major sixth
59 931.6 supermajor sixth
60 947.4 ultramajor sixth
61 963.2 subminor seventh
62 978.9 subminor seventh
63 994.7 minor seventh
64 1010.5 minor seventh
65 1026.3 supraminor seventh
66 1042.1 neutral seventh
67 1057.9 neutral seventh
68 1073.7 submajor seventh
69 1089.5 major seventh
70 1105.3 major seventh
71 1121.1 supermajor seventh
72 1136.8 supermajor seventh
73 1152.6 ultramajor seventh
74 1168.4 suboctave
75 1184.2 suboctave
76 1200.0 perfect octave