2ed5
← 1ed5 | 2ed5 | 3ed5 → |
(convergent)
(semiconvergent)
2 equal divisions of the 5th harmonic (abbreviated 2ed5) is a nonoctave tuning system that divides the interval of 5/1 into 2 equal parts of about 1390 ¢ each. Each step represents a frequency ratio of 51/2, or the 2nd root of 5.
Theory
Odd harmonics
Harmonic | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Error | Absolute (¢) | +193 | -509 | +386 | +0 | -316 | -583 | +579 | +376 | +193 | +28 | -122 |
Relative (%) | +13.9 | -36.5 | +27.7 | +0.0 | -22.7 | -41.8 | +41.6 | +27.0 | +13.9 | +2.0 | -8.8 | |
Steps (reduced) |
1 (1) |
1 (1) |
2 (0) |
2 (0) |
2 (0) |
2 (0) |
3 (1) |
3 (1) |
3 (1) |
3 (1) |
3 (1) |
Interval table
Steps | Cents | Approximate ratios |
---|---|---|
0 | 0 | 1/1, 11/10, 12/11, 13/12, 14/13, 15/14, 17/16, 19/17, 20/19 |
1 | 1393.2 | 2/1, 5/2, 7/3, 11/5, 12/5, 13/6, 15/7, 17/8, 18/7, 19/8 |
2 | 2786.3 | 5/1, 11/2, 14/3, 19/4 |