8269edo
| ← 8268edo | 8269edo | 8270edo → |
8269 equal divisions of the octave (abbreviated 8269edo or 8269ed2), also called 8269-tone equal temperament (8269tet) or 8269 equal temperament (8269et) when viewed under a regular temperament perspective, is the tuning system that divides the octave into 8269 equal parts of about 0.145 ¢ each. Each step represents a frequency ratio of 21/8269, or the 8269th root of 2.
8269edo is both a zeta peak and zeta integral edo, which has to do with the fact that it is a very strong 19- and 23-limit division. It has a lower 19-limit and a lower 23-limit relative error than any smaller division, a lower 19-limit TE logflat badness than any smaller division, and a lower 23-limit logflat badness than any excepting 311, 581, 1578 and 2460. While 8539 has received most of the attention in this size range, 8269 is actually a bit better in the 23-limit and nearly as good in the 19-limit. They are rather like twins, including the fact both are primes. A step of 8269edo has also been similarly proposed as an interval size measure, the major tina.
Prime harmonics
| Harmonic | 2 | 3 | 5 | 7 | 11 | 13 | 17 | 19 | 23 | 29 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Error | absolute (¢) | +0.0000 | -0.0080 | -0.0034 | -0.0026 | -0.0058 | +0.0093 | -0.0334 | -0.0163 | -0.0484 | +0.0515 | -0.0362 |
| relative (%) | +0 | -5 | -2 | -2 | -4 | +6 | -23 | -11 | -33 | +36 | -25 | |
| Steps (reduced) |
8269 (0) |
13106 (4837) |
19200 (2662) |
23214 (6676) |
28606 (3799) |
30599 (5792) |
33799 (723) |
35126 (2050) |
37405 (4329) |
40171 (7095) |
40966 (7890) | |
Subsets and supersets
8269edo is the 1037th prime edo.