11afdo
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| Prime factorization | 11 (prime) |
| Fifth | 17/11 (753.637c) |
| Dual sharp fifth | 17/11 (753.637c) |
| Dual flat fifth | 16/11 (648.682c) |
11afdo (arithmetic frequency division of the octave), or 11odo (otonal division of the octave), divides the octave into eleven parts of 1/11 each. As a scale it may be known as mode 11 of the harmonic series or the Over-11 scale. As 11 is a small odd number, this AFDO does not contain a perfect fifth above the root, although it does contain a 16/11 subfifth and a 17/11 ultrafifth / inframinor sixth.
Intervals
| # | Cents | Ratio | Decimal | Interval name | Audio |
|---|---|---|---|---|---|
| 0 | 0 | 1/1 | 1.0000 | perfect unison | |
| 1 | 150.63 | 12/11 | 1.0909 | small whole tone | |
| 2 | 289.21 | 13/11 | 1.1818 | tridecimal minor third | |
| 3 | 417.51 | 14/11 | 1.2727 | undecimal major third | |
| 4 | 536.95 | 15/11 | 1.3636 | undecimal augmented fourth | |
| 5 | 648.68 | 16/11 | 1.4545 | undecimal subfifth | |
| 6 | 753.64 | 17/11 | 1.5455 | septendecimal subminor sixth | |
| 7 | 852.59 | 18/11 | 1.6364 | undecimal neutral sixth | |
| 8 | 946.20 | 19/11 | 1.7273 | undevicesimal semitwelfth | |
| 9 | 1035.00 | 20/11 | 1.8182 | undecimal supraminor seventh | |
| 10 | 1119.46 | 21/11 | 1.9091 | undecimal major seventh | |
| 11 | 1200.00 | 2/1 | 2.000 | perfect octave |