1407edo
| ← 1406edo | 1407edo | 1408edo → |
1407 equal divisions of the octave (abbreviated 1407edo or 1407ed2), also called 1407-tone equal temperament (1407tet) or 1407 equal temperament (1407et) when viewed under a regular temperament perspective, is the tuning system that divides the octave into 1407 equal parts of about 0.853 ¢ each. Each step represents a frequency ratio of 21/1407, or the 1407th root of 2.
Theory
1407edo is excellent in the 7-limit, in which it supports the 441 & 966 akjayland temperament with period 21. Just like 441edo, it tempers out the akjaysma and the landscape comma. However, unlike 441edo it does not temper out the tritrizo comma, since 1407 is not divisible by 9.
It tunes the pure bastille temperament in the 1407eff val and the marvelous bastille temperament in the patent val in the 13-limit.
Prime harmonics
| Harmonic | 2 | 3 | 5 | 7 | 11 | 13 | 17 | 19 | 23 | 29 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Error | Absolute (¢) | +0.000 | -0.036 | +0.040 | +0.044 | -0.358 | +0.411 | -0.051 | +0.142 | +0.297 | -0.153 | +0.380 |
| Relative (%) | +0.0 | -4.2 | +4.7 | +5.2 | -42.0 | +48.1 | -6.0 | +16.6 | +34.8 | -17.9 | +44.6 | |
| Steps (reduced) |
1407 (0) |
2230 (823) |
3267 (453) |
3950 (1136) |
4867 (646) |
5207 (986) |
5751 (123) |
5977 (349) |
6365 (737) |
6835 (1207) |
6971 (1343) | |
Subsets and supersets
Since 1407 factors into 3 × 7 × 67, 1407edo has subset edos 3, 7, 21, 67, 201, and 469.
Regular temperament properties
Rank-2 temperaments
| Periods per 8ve |
Generator* | Cents* | Associated ratio* |
Temperaments |
|---|---|---|---|---|
| 1 | 814\1407 | 694.243 | [381 0 -159 -4⟩ | Bastille (2.5.7) / pure bastille (1407eff) / marvelous bastille (1407) |
| 3 | 292\1407 | 249.040 | 1536/1331 | Tribilo |
| 7 | 10\1407 | 8.529 | 1029/1024 | Nitrogen |
| 21 | 686\1407 (16\1407) |
585.074 (13.646) |
91875/65536 (126/125) |
Akjayland |
* Octave-reduced form, reduced to the first half-octave, and minimal form in parentheses if it is distinct