58edf
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| ← 57edf | 58edf | 59edf → |
58 equal divisions of the perfect fifth (abbreviated 58edf or 58ed3/2) is a nonoctave tuning system that divides the interval of 3/2 into 58 equal parts of about 12.1 ¢ each. Each step represents a frequency ratio of (3/2)1/58, or the 58th root of 3/2.
Theory
58edf corresponds to 99.1517…edo. It is related to 99edo, but with the perfect fifth rather than the octave being just. The octave is compressed by about 1.84 cents. 58edf is consistent to the 12-integer-limit. In comparison, 99edo is only consistent up to the 10-integer-limit. 58edf has a flat tendency, with prime harmonics 2, 3, 5, 7, and 11 all tuned flat of just.
Harmonics
| Harmonic | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Error | Absolute (¢) | -1.84 | -1.84 | -3.67 | -2.70 | -3.67 | -4.28 | -5.51 | -3.67 | -4.53 | -0.10 | -5.51 |
| Relative (%) | -15.2 | -15.2 | -30.3 | -22.3 | -30.3 | -35.4 | -45.5 | -30.3 | -37.5 | -0.8 | -45.5 | |
| Steps (reduced) |
99 (41) |
157 (41) |
198 (24) |
230 (56) |
256 (24) |
278 (46) |
297 (7) |
314 (24) |
329 (39) |
343 (53) |
355 (7) | |
| Harmonic | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Error | Absolute (¢) | +1.15 | +5.98 | -4.53 | +4.76 | -3.37 | -5.51 | -2.29 | +5.73 | +5.98 | -1.94 | +5.83 | +4.76 |
| Relative (%) | +9.5 | +49.4 | -37.5 | +39.3 | -27.9 | -45.5 | -18.9 | +47.4 | +49.4 | -16.0 | +48.1 | +39.3 | |
| Steps (reduced) |
367 (19) |
378 (30) |
387 (39) |
397 (49) |
405 (57) |
413 (7) |
421 (15) |
429 (23) |
436 (30) |
442 (36) |
449 (43) |
455 (49) | |
Subsets and supersets
Since 58 factors into primes as 2 × 29, 58edf contains 2edf and 29edf as subset edts.