20ed7

Revision as of 23:43, 22 December 2024 by BudjarnLambeth (talk | contribs) (Harmonics, stub)

Division of the 7th harmonic into 20 equal parts (20ed7) is related to the meantone temperament. The step size is about 168.4413 cents, corresponding to 7.1241 edo.

← 19ed7 20ed7 21ed7 →
Prime factorization 22 × 5
Step size 168.441 ¢ 
Octave 7\20ed7 (1179.09 ¢)
Twelfth 11\20ed7 (1852.85 ¢)
Consistency limit 4
Distinct consistency limit 4

Intervals

degree cents value corresponding
JI intervals
comments
0 0.0000 exact 1/1
1 168.4413 11/10
2 336.8826 17/14
3 505.3239 91/68
4 673.7652 28/19, 96/65, 65/44, 34/23
5 842.2065 13/8
6 1010.6478 70/39
7 1179.0891 77/39
8 1347.5304 24/11
9 1515.9717 12/5
10 1684.4130 119/45, 45/17
11 1852.8542 35/12
12 2021.2955 77/24
13 2189.7368 39/11
14 2358.1781 39/10
15 2526.6194 56/13
16 2695.0607 19/4
17 2863.5020 68/13
18 3031.9433 98/17
19 3200.3846 70/11
20 3368.8259 exact 7/1 harmonic seventh plus two octaves

Harmonics

Approximation of prime harmonics in 20ed7
Harmonic 2 3 5 7 11 13 17 19 23 29 31
Error Absolute (¢) -20.9 -49.1 +77.2 +0.0 +59.7 -61.1 -20.2 -44.3 -38.2 +65.9 -49.6
Relative (%) -12.4 -29.2 +45.8 +0.0 +35.5 -36.2 -12.0 -26.3 -22.7 +39.1 -29.4
Steps
(reduced)
7
(7)
11
(11)
17
(17)
20
(0)
25
(5)
26
(6)
29
(9)
30
(10)
32
(12)
35
(15)
35
(15)
Approximation of prime harmonics in 20ed7
Harmonic 37 41 43 47 53 59 61 67 71 73 79
Error Absolute (¢) -19.0 -28.3 +57.7 +72.1 +32.6 +15.4 -42.4 -36.3 +31.7 -16.4 +15.3
Relative (%) -11.3 -16.8 +34.3 +42.8 +19.3 +9.1 -25.1 -21.6 +18.8 -9.7 +9.1
Steps
(reduced)
37
(17)
38
(18)
39
(19)
40
(0)
41
(1)
42
(2)
42
(2)
43
(3)
44
(4)
44
(4)
45
(5)


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