256ed5
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Prime factorization
28
Step size
10.884¢
Octave
110\256ed5 (1197.24¢) (→55\128ed5)
Twelfth
175\256ed5 (1904.71¢)
Consistency limit
2
Distinct consistency limit
2
| ← 255ed5 | 256ed5 | 257ed5 → |
256 equal divisions of the 5th harmonic is an equal-step tuning where each step represents a frequency ratio of 256th root of 5, which amounts to 3.90625 millipentaves or about 10.884 cents. It is equivalent to 110.2532 EDO.
256ed5 combines dual-fifth systems with quarter-comma meantone.
Theory
| Harmonic | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Error | absolute (¢) | -2.76 | +2.75 | +5.37 | +0.00 | -0.00 | +5.23 | +2.62 | -5.38 | -2.76 | -4.50 | -2.76 |
| relative (%) | -25 | +25 | +49 | +0 | -0 | +48 | +24 | -49 | -25 | -41 | -25 | |
| Steps (reduced) |
110 (110) |
175 (175) |
221 (221) |
256 (0) |
285 (29) |
310 (54) |
331 (75) |
349 (93) |
366 (110) |
381 (125) |
395 (139) | |
In 256ed5, the just perfect fifth of 3/2, corresponds to approximately 64.5 steps, thus occurring almost halfway between the quarter-comma meantone fifth and it's next step.
Uniquely, 6/5 is nearly perfect.
Table of intervals
| Step | Name | Size (cents) | Size (millipentaves) | Associated ratio |
|---|---|---|---|---|
| 0 | prime, unison | 0 | 0 | exact 1/1 |
| 29 | classical minor third | 315.63710 | 113.28125 | 6/5 |
| 64 | minor fifth | 696.57843 | 250 | 3/2 I, exact 4th root of(5) |
| 65 | major fifth | 253.90625 | ||
| 128 | octitone, symmetric ninth | 1393.15686 | 500 | |
| 256 | pentave, fifth harmonic | 2786.31371 | 1000 | exact 5/1 |