186ed6
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Division of the sixth harmonic into 186 equal parts (186ED6) is related to 72 edo, but with the 6/1 rather than the 2/1 being just. The octave is about 1.2347 cents stretched and the step size is about 16.6838 cents. It is consistent to the 18-integer-limit, and significantly improves on 72edo's approximation to 13.
Harmonics
| Harmonic | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Error | Absolute (¢) | +0.76 | -0.76 | +1.51 | -1.23 | +0.00 | -0.04 | +2.27 | -1.51 | -0.47 | +1.30 | +0.76 | -4.40 | +0.72 | -1.98 | +3.03 | -1.87 | -0.76 |
| Relative (%) | +4.5 | -4.5 | +9.1 | -7.3 | +0.0 | -0.2 | +13.6 | -9.1 | -2.8 | +7.8 | +4.5 | -26.4 | +4.3 | -11.9 | +18.2 | -11.2 | -4.5 | |
| Steps (reduced) |
72 (72) |
114 (114) |
144 (144) |
167 (167) |
186 (0) |
202 (16) |
216 (30) |
228 (42) |
239 (53) |
249 (63) |
258 (72) |
266 (80) |
274 (88) |
281 (95) |
288 (102) |
294 (108) |
300 (114) | |
Intervals
| Steps | Cents | Approximate ratios |
|---|---|---|
| 0 | 0 | 1/1 |
| 1 | 16.68 | |
| 2 | 33.35 | 51/50, 52/51 |
| 3 | 50.03 | 35/34 |
| 4 | 66.71 | 26/25 |
| 5 | 83.39 | 21/20 |
| 6 | 100.06 | 18/17 |
| 7 | 116.74 | 46/43 |
| 8 | 133.42 | 27/25 |
| 9 | 150.09 | 12/11 |
| 10 | 166.77 | |
| 11 | 183.45 | 10/9 |
| 12 | 200.13 | 55/49, 64/57 |
| 13 | 216.8 | 17/15 |
| 14 | 233.48 | |
| 15 | 250.16 | 37/32, 52/45 |
| 16 | 266.83 | 7/6 |
| 17 | 283.51 | 33/28 |
| 18 | 300.19 | 44/37 |
| 19 | 316.87 | |
| 20 | 333.54 | 40/33, 57/47 |
| 21 | 350.22 | 49/40, 60/49 |
| 22 | 366.9 | 21/17, 47/38 |
| 23 | 383.58 | |
| 24 | 400.25 | 34/27, 63/50 |
| 25 | 416.93 | 14/11 |
| 26 | 433.61 | |
| 27 | 450.28 | 35/27, 48/37 |
| 28 | 466.96 | 38/29, 55/42 |
| 29 | 483.64 | 37/28 |
| 30 | 500.32 | |
| 31 | 516.99 | 31/23 |
| 32 | 533.67 | 49/36, 64/47 |
| 33 | 550.35 | 11/8 |
| 34 | 567.02 | 43/31 |
| 35 | 583.7 | 7/5 |
| 36 | 600.38 | 41/29, 58/41 |
| 37 | 617.06 | 10/7 |
| 38 | 633.73 | 49/34, 62/43 |
| 39 | 650.41 | |
| 40 | 667.09 | 25/17 |
| 41 | 683.76 | 46/31, 49/33 |
| 42 | 700.44 | |
| 43 | 717.12 | 56/37 |
| 44 | 733.8 | 55/36 |
| 45 | 750.47 | 37/24, 54/35 |
| 46 | 767.15 | |
| 47 | 783.83 | |
| 48 | 800.5 | 27/17 |
| 49 | 817.18 | |
| 50 | 833.86 | 34/21, 55/34 |
| 51 | 850.54 | 49/30 |
| 52 | 867.21 | 33/20 |
| 53 | 883.89 | 5/3 |
| 54 | 900.57 | 37/22 |
| 55 | 917.24 | |
| 56 | 933.92 | 12/7 |
| 57 | 950.6 | 45/26 |
| 58 | 967.28 | |
| 59 | 983.95 | 30/17 |
| 60 | 1000.63 | 57/32 |
| 61 | 1017.31 | 9/5 |
| 62 | 1033.99 | 20/11 |
| 63 | 1050.66 | |
| 64 | 1067.34 | 50/27, 63/34 |
| 65 | 1084.02 | 43/23 |
| 66 | 1100.69 | 17/9 |
| 67 | 1117.37 | |
| 68 | 1134.05 | 52/27 |
| 69 | 1150.73 | 35/18 |
| 70 | 1167.4 | 51/26 |
| 71 | 1184.08 | |
| 72 | 1200.76 | 2/1 |
| 73 | 1217.43 | |
| 74 | 1234.11 | 51/25 |
| 75 | 1250.79 | 35/17 |
| 76 | 1267.47 | 52/25 |
| 77 | 1284.14 | 21/10 |
| 78 | 1300.82 | |
| 79 | 1317.5 | |
| 80 | 1334.17 | 54/25 |
| 81 | 1350.85 | 24/11 |
| 82 | 1367.53 | |
| 83 | 1384.21 | |
| 84 | 1400.88 | |
| 85 | 1417.56 | 34/15 |
| 86 | 1434.24 | |
| 87 | 1450.91 | 37/16 |
| 88 | 1467.59 | 7/3 |
| 89 | 1484.27 | 33/14 |
| 90 | 1500.95 | 50/21 |
| 91 | 1517.62 | |
| 92 | 1534.3 | |
| 93 | 1550.98 | 49/20 |
| 94 | 1567.65 | 47/19 |
| 95 | 1584.33 | |
| 96 | 1601.01 | 63/25 |
| 97 | 1617.69 | 28/11 |
| 98 | 1634.36 | 18/7 |
| 99 | 1651.04 | |
| 100 | 1667.72 | 55/21 |
| 101 | 1684.39 | 45/17 |
| 102 | 1701.07 | |
| 103 | 1717.75 | 62/23 |
| 104 | 1734.43 | 49/18 |
| 105 | 1751.1 | 11/4 |
| 106 | 1767.78 | 25/9 |
| 107 | 1784.46 | |
| 108 | 1801.14 | |
| 109 | 1817.81 | 20/7 |
| 110 | 1834.49 | |
| 111 | 1851.17 | |
| 112 | 1867.84 | 50/17 |
| 113 | 1884.52 | |
| 114 | 1901.2 | 3/1 |
| 115 | 1917.88 | |
| 116 | 1934.55 | 52/17, 55/18 |
| 117 | 1951.23 | |
| 118 | 1967.91 | |
| 119 | 1984.58 | |
| 120 | 2001.26 | 54/17 |
| 121 | 2017.94 | |
| 122 | 2034.62 | |
| 123 | 2051.29 | |
| 124 | 2067.97 | 33/10 |
| 125 | 2084.65 | 10/3 |
| 126 | 2101.32 | 64/19 |
| 127 | 2118 | 17/5 |
| 128 | 2134.68 | |
| 129 | 2151.36 | 52/15 |
| 130 | 2168.03 | 7/2 |
| 131 | 2184.71 | |
| 132 | 2201.39 | |
| 133 | 2218.06 | 18/5 |
| 134 | 2234.74 | 40/11 |
| 135 | 2251.42 | |
| 136 | 2268.1 | 63/17 |
| 137 | 2284.77 | |
| 138 | 2301.45 | 34/9 |
| 139 | 2318.13 | |
| 140 | 2334.8 | |
| 141 | 2351.48 | 35/9 |
| 142 | 2368.16 | 55/14 |
| 143 | 2384.84 | |
| 144 | 2401.51 | |
| 145 | 2418.19 | |
| 146 | 2434.87 | 49/12 |
| 147 | 2451.55 | |
| 148 | 2468.22 | |
| 149 | 2484.9 | 21/5 |
| 150 | 2501.58 | |
| 151 | 2518.25 | 30/7 |
| 152 | 2534.93 | |
| 153 | 2551.61 | 48/11 |
| 154 | 2568.29 | |
| 155 | 2584.96 | |
| 156 | 2601.64 | |
| 157 | 2618.32 | |
| 158 | 2634.99 | 55/12 |
| 159 | 2651.67 | 37/8 |
| 160 | 2668.35 | |
| 161 | 2685.03 | 33/7 |
| 162 | 2701.7 | |
| 163 | 2718.38 | |
| 164 | 2735.06 | 34/7 |
| 165 | 2751.73 | 49/10 |
| 166 | 2768.41 | |
| 167 | 2785.09 | |
| 168 | 2801.77 | |
| 169 | 2818.44 | 56/11 |
| 170 | 2835.12 | 36/7 |
| 171 | 2851.8 | |
| 172 | 2868.47 | |
| 173 | 2885.15 | |
| 174 | 2901.83 | |
| 175 | 2918.51 | 27/5 |
| 176 | 2935.18 | |
| 177 | 2951.86 | 11/2 |
| 178 | 2968.54 | 50/9 |
| 179 | 2985.21 | |
| 180 | 3001.89 | 17/3 |
| 181 | 3018.57 | 40/7 |
| 182 | 3035.25 | |
| 183 | 3051.92 | |
| 184 | 3068.6 | |
| 185 | 3085.28 | |
| 186 | 3101.96 | 6/1 |