88/81
88/81, the 2nd undecimal neutral second[1], is an interval of about 143.5 cents. It is 352/351 (4.9 cents) sharp of 13/12 and 243/242 (7.1 cents) flat of 12/11. It is also the interval between 9/8 and 11/9. In Alpharabian tuning it is known as the Alpharabian artoneutral second.
| Interval information |
Alpharabian artoneutral second
Approximation
| Edo | Step size | Cents (¢) | Absolute error (¢) | Relative error (%) |
|---|---|---|---|---|
| 8 | 1\8 | 150.00 | +6.50 | +4.33 |
| 9 | 1\9 | 133.33 | -10.16 | -7.62 |
| 16 | 2\16 | 150.00 | +6.50 | +8.67 |
| 17 | 2\17 | 141.18 | -2.32 | -3.29 |
| 25 | 3\25 | 144.00 | +0.50 | +1.05 |
| 33 | 4\33 | 145.45 | +1.96 | +5.38 |
| 34 | 4\34 | 141.18 | -2.32 | -6.58 |
| 41 | 5\41 | 146.34 | +2.84 | +9.72 |
| 42 | 5\42 | 142.86 | -0.64 | -2.24 |
| 50 | 6\50 | 144.00 | +0.50 | +2.09 |
| 51 | 6\51 | 141.18 | -2.32 | -9.87 |
| 58 | 7\58 | 144.83 | +1.33 | +6.43 |
| 59 | 7\59 | 142.37 | -1.13 | -5.53 |
| 67 | 8\67 | 143.28 | -0.21 | -1.20 |
| 75 | 9\75 | 144.00 | +0.50 | +3.14 |
| 76 | 9\76 | 142.11 | -1.39 | -8.82 |