User:Contribution/Exploring 31-EDO

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11-limit optimizations of 31-EDO

Euler-product

Approximation of prime harmonics in 11-limit Euler-product (σ = 1.0) optimization of 31-EDO
Harmonic 2 3 5 7 11 13 17 19 23 29 31
Error Absolute (¢) +1.0 -3.5 +3.2 +1.8 -5.8 +14.9 +15.4 +16.6 -4.3 -18.1 -17.4
Relative (%) +2.7 -9.2 +8.2 +4.7 -15.0 +38.5 +39.8 +42.8 -11.0 -46.8 -44.8
Step 31 49 72 87 107 115 127 132 140 150 153

Tenney-Euclidian regular temperament

Approximation of prime harmonics in 11-limit Tenney-Euclidian optimization of 31-EDO
Harmonic 2 3 5 7 11 13 17 19 23 29 31
Error Absolute (¢) +1.2 -3.3 +3.6 +2.3 -5.2 +15.6 +16.1 +17.3 -3.5 -17.3 -16.5
Relative (%) +3.1 -8.5 +9.2 +5.9 -13.5 +40.1 +41.6 +44.6 -9.0 -44.6 -42.6
Step 31 49 72 87 107 115 127 132 140 150 153

121-ED15

121-ED15 offers a good trade-off between these two optimization methods for 11-limit in 31-EDO.

Approximation of prime harmonics in 121-ED15
Harmonic 2 3 5 7 11 13 17 19 23 29 31
Error Absolute (¢) +1.1 -3.4 +3.4 +2.1 -5.5 +15.3 +15.8 +17.0 -3.8 -17.7 -16.9
Relative (%) +2.9 -8.8 +8.8 +5.4 -14.2 +39.4 +40.8 +43.8 -9.9 -45.6 -43.6
Steps
(reduced)
31
(31)
49
(49)
72
(72)
87
(87)
107
(107)
115
(115)
127
(6)
132
(11)
140
(19)
150
(29)
153
(32)


90-ED15/2

90-ED15/2 is another good option for helping the 11-limit.

Approximation of prime harmonics in 90-ED15/2
Harmonic 2 3 5 7 11 13 17 19 23 29 31
Error Absolute (¢) +1.5 -2.8 +4.3 +3.2 -4.2 +16.7 +17.4 +18.6 -2.1 -15.8 -15.0
Relative (%) +3.9 -7.2 +11.1 +8.2 -10.7 +43.1 +44.8 +48.0 -5.4 -40.8 -38.6
Steps
(reduced)
31
(31)
49
(49)
72
(72)
87
(87)
107
(17)
115
(25)
127
(37)
132
(42)
140
(50)
150
(60)
153
(63)

170-ED45

170-ED45 is another good option for helping the 11-limit.

Approximation of prime harmonics in 170-ED45
Harmonic 2 3 5 7 11 13 17 19 23 29 31
Error Absolute (¢) +1.7 -2.4 +4.8 +3.8 -3.4 +17.6 +18.3 -19.2 -1.0 -14.7 -13.8
Relative (%) +4.5 -6.2 +12.5 +9.8 -8.7 +45.3 +47.3 -49.4 -2.7 -37.9 -35.7
Steps
(reduced)
31
(31)
49
(49)
72
(72)
87
(87)
107
(107)
115
(115)
127
(127)
131
(131)
140
(140)
150
(150)
153
(153)


80-ED6

80-ED6 is another good option for helping the 11-limit.

Approximation of prime harmonics in 80-ED6
Harmonic 2 3 5 7 11 13 17 19 23 29 31
Error Absolute (¢) +2.0 -2.0 +5.4 +4.6 -2.5 +18.5 -19.4 -18.1 +0.1 -13.4 -12.5
Relative (%) +5.2 -5.2 +14.0 +11.7 -6.3 +47.8 -50.0 -46.6 +0.4 -34.6 -32.4
Steps
(reduced)
31
(31)
49
(49)
72
(72)
87
(7)
107
(27)
115
(35)
126
(46)
131
(51)
140
(60)
150
(70)
153
(73)


59-ED15/4

59-ED15/4 is another good option for helping the 11-limit.

Approximation of prime harmonics in 59-ED15/4
Harmonic 2 3 5 7 11 13 17 19 23 29 31
Error Absolute (¢) +2.3 -1.5 +6.1 +5.4 -1.4 -19.1 -18.1 -16.8 +1.5 -11.9 -11.1
Relative (%) +6.0 -3.9 +15.9 +13.9 -3.6 -49.3 -46.8 -43.3 +3.9 -30.8 -28.5
Steps
(reduced)
31
(31)
49
(49)
72
(13)
87
(28)
107
(48)
114
(55)
126
(8)
131
(13)
140
(22)
150
(32)
153
(35)