338edo
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Prime factorization
2 × 132
Step size
3.5503¢
Fifth
198\338 (702.959¢) (→99\169)
Semitones (A1:m2)
34:24 (120.7¢ : 85.21¢)
Consistency limit
7
Distinct consistency limit
7
| ← 337edo | 338edo | 339edo → |
338 equal divisions of the octave (abbreviated 338edo or 338ed2), also called 338-tone equal temperament (338tet) or 338 equal temperament (338et) when viewed under a regular temperament perspective, is the tuning system that divides the octave into 338 equal parts of about 3.55 ¢ each. Each step represents a frequency ratio of 21/338, or the 338th root of 2.
The equal temperament tempers out [23 6 -14⟩ (vishnuzma) in the 5-limit, and 2401/2400, 5120/5103 and 10976/10935 in the 7-limit. It provides the optimal patent val for 7-limit hemififths, the 99 & 239 temperament.
Odd harmonics
| Harmonic | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 | 21 | 23 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Error | absolute (¢) | +1.00 | +0.67 | +0.40 | -1.54 | -1.02 | +0.89 | +1.67 | +1.55 | +0.71 | +1.41 | +0.13 |
| relative (%) | +28 | +19 | +11 | -43 | -29 | +25 | +47 | +44 | +20 | +40 | +4 | |
| Steps (reduced) |
536 (198) |
785 (109) |
949 (273) |
1071 (57) |
1169 (155) |
1251 (237) |
1321 (307) |
1382 (30) |
1436 (84) |
1485 (133) |
1529 (177) | |
Subsets and supersets
Since 338 factors into 2 × 132, 338edo has subset edos 2, 13, 26, and 169.