11afdo
Template:Infobox ADO 11ado is the arithmetic equal division of the octave into nine parts of 1/9 each. As 9 is a small odd number, this ADO does not contain a perfect fifth above the root, although it does contain a 16/11 subfifth.
Intervals
| # | Cents | Ratio | Decimal | Interval name | Audio |
|---|---|---|---|---|---|
| 0 | 0 | 1/1 | 1.0000 | perfect unison | |
| 1 | 182.4 | 10/9 | 1.1111 | small whole tone | |
| 2 | 347.4 | 11/9 | 1.2222 | undecimal neutral third | |
| 3 | 498.0 | 4/3 | 1.3333 | undecimal neutral third | |
| 4 | 636.6 | 13/9 | 1.4444 | tridecimal diminished fifth | |
| 5 | 764.9 | 14/9 | 1.5556 | subminor sixth | |
| 6 | 884.4 | 5/3 | 1.6667 | just major sixth | |
| 7 | 996.1 | 16/9 | 1.7778 | Pythagorean minor seventh | |
| 8 | 1101.0 | 17/9 | 1.8889 | large septendecimal major seventh | |
| 9 | 1200.0 | 2/1 | 2.0000 | perfect octave |