13edo scales: Difference between revisions

The decatonic scale is optimized for 4:5:13 triads. It's generated by a major third, and two of them span a 4:5:13 triad, spanning degrees 1-4-8, and three of them span a 4:5:13:21 tetrad. Another advantage is that 11/8 belongs to the same interval class as 21/16 so you can make both extensions with one scale degree.