283edo
| ← 282edo | 283edo | 284edo → |
283 equal divisions of the octave (abbreviated 283edo or 283ed2), also called 283-tone equal temperament (283tet) or 283 equal temperament (283et) when viewed under a regular temperament perspective, is the tuning system that divides the octave into 283 equal parts of about 4.24 ¢ each. Each step represents a frequency ratio of 21/283, or the 283rd root of 2.
283edo is inconsistent to the 5-odd-limit and the harmonic 3 is about halfway between its steps. Otherwise it is good in approximating harmonics 5, 9, 11, 13, 17, 19, 21, and 23, making it suitable for a 2.9.5.21.11.13.17.19.23 subgroup interpretation.
Using the patent val nonetheless, the equal temperament is closely associated with the sensamagic comma (245/243), defining the optimal patent val for the sensamagic 7-limit planar temperament as well as escaped, which tempers out both 245/243 and 65625/65536 in the 7-limit, 385/384 and 4000/3993 in the 11-limit, and 352/351 and 625/624 in the 13-limit.
Odd harmonics
| Harmonic | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 | 21 | 23 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Error | absolute (¢) | +1.93 | -0.45 | -2.04 | -0.38 | -0.08 | -0.95 | +1.48 | +1.05 | -0.69 | -0.11 | -0.71 |
| relative (%) | +46 | -11 | -48 | -9 | -2 | -22 | +35 | +25 | -16 | -3 | -17 | |
| Steps (reduced) |
449 (166) |
657 (91) |
794 (228) |
897 (48) |
979 (130) |
1047 (198) |
1106 (257) |
1157 (25) |
1202 (70) |
1243 (111) |
1280 (148) | |
Subsets and supersets
283edo is the 61st prime edo.