7afdo
7ado is the arithmetic equal division of the octave into seven parts of 1/7 each. As 7 is a small odd number, this ADO does not contain a perfect fifth or any reasonable approximation to it, and it is relatively poor for its size at creating traditional tonal music.
Intervals
| # | Cents | Ratio | Interval name | Audio |
|---|---|---|---|---|
| 0 | 0 | 1/1 | perfect unison | |
| 1 | 231.2 | 8/7 | supermajor second | |
| 2 | 435.1 | 9/7 | supermajor third | |
| 3 | 617.5 | 10/7 | high tritone | |
| 4 | 782.4 | 11/7 | undecimal minor sixth | |
| 5 | 933.1 | 12/7 | supermajor sixth | |
| 6 | 1071.7 | tridecimal submajor seventh | File:Jid 13.7 pluck adu dr220.mp3 | |
| 7 | 1200.0 | 2/1 | perfect octave |