37edt: Difference between revisions
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Revision as of 15:31, 31 July 2025
| ← 36edt | 37edt | 38edt → |
37EDT is the equal division of the third harmonic into 37 parts of 51.4042 cents each, corresponding to 23.4355 edo. The tunings supplied by 111EDT (or 70edo) cannot be used for all low-limit just intervals, but they can be used on the 17-limit 8.3.100.70.22.52.68 just intonation subgroup, tempering out 289/288, 325/324, 352/351, 385/384, 561/560, 595/594, 625/624, 676/675, 1089/1088, 1156/1155, 1225/1224, and 1331/1326.
Harmonics
| Harmonic | 2 | 3 | 5 | 7 | 11 | 13 | 17 | 19 | 23 | 29 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Error | Absolute (¢) | -17.7 | +0.0 | -10.5 | +23.9 | +12.4 | -19.8 | -21.6 | -8.5 | +20.6 | -20.9 | +17.9 |
| Relative (%) | -34.4 | +0.0 | -20.4 | +46.4 | +24.2 | -38.5 | -41.9 | -16.5 | +40.0 | -40.7 | +34.7 | |
| Steps (reduced) |
23 (23) |
37 (0) |
54 (17) |
66 (29) |
81 (7) |
86 (12) |
95 (21) |
99 (25) |
106 (32) |
113 (2) |
116 (5) | |
| Harmonic | 37 | 41 | 43 | 47 | 53 | 59 | 61 | 67 | 71 | 73 | 79 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Error | Absolute (¢) | +20.0 | -3.5 | +16.8 | +17.0 | +14.7 | -16.8 | -23.1 | +20.1 | +22.5 | -25.6 | -8.1 |
| Relative (%) | +38.8 | -6.9 | +32.7 | +33.1 | +28.5 | -32.7 | -45.0 | +39.1 | +43.8 | -49.8 | -15.8 | |
| Steps (reduced) |
122 (11) |
125 (14) |
127 (16) |
130 (19) |
134 (23) |
137 (26) |
138 (27) |
142 (31) |
144 (33) |
144 (33) |
147 (36) | |
Intervals
| Steps | Cents | Hekts | Approximate ratios |
|---|---|---|---|
| 0 | 0 | 0 | 1/1 |
| 1 | 51.4 | 35.1 | |
| 2 | 102.8 | 70.3 | 18/17 |
| 3 | 154.2 | 105.4 | 23/21 |
| 4 | 205.6 | 140.5 | |
| 5 | 257 | 175.7 | 22/19, 29/25 |
| 6 | 308.4 | 210.8 | 6/5 |
| 7 | 359.8 | 245.9 | 27/22 |
| 8 | 411.2 | 281.1 | 14/11, 19/15 |
| 9 | 462.6 | 316.2 | 17/13 |
| 10 | 514 | 351.4 | |
| 11 | 565.4 | 386.5 | 18/13, 25/18 |
| 12 | 616.9 | 421.6 | |
| 13 | 668.3 | 456.8 | 22/15, 25/17, 28/19 |
| 14 | 719.7 | 491.9 | |
| 15 | 771.1 | 527 | 14/9 |
| 16 | 822.5 | 562.2 | 29/18 |
| 17 | 873.9 | 597.3 | |
| 18 | 925.3 | 632.4 | 17/10, 29/17 |
| 19 | 976.7 | 667.6 | |
| 20 | 1028.1 | 702.7 | |
| 21 | 1079.5 | 737.8 | 28/15 |
| 22 | 1130.9 | 773 | 25/13, 27/14 |
| 23 | 1182.3 | 808.1 | |
| 24 | 1233.7 | 843.2 | |
| 25 | 1285.1 | 878.4 | |
| 26 | 1336.5 | 913.5 | 13/6 |
| 27 | 1387.9 | 948.6 | 29/13 |
| 28 | 1439.3 | 983.8 | |
| 29 | 1490.7 | 1018.9 | |
| 30 | 1542.1 | 1054.1 | 22/9 |
| 31 | 1593.5 | 1089.2 | 5/2 |
| 32 | 1644.9 | 1124.3 | |
| 33 | 1696.3 | 1159.5 | |
| 34 | 1747.7 | 1194.6 | |
| 35 | 1799.1 | 1229.7 | 17/6 |
| 36 | 1850.6 | 1264.9 | 29/10 |
| 37 | 1902 | 1300 | 3/1 |