3-7-9-11-13-15 eikosany
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A 15-odd-limit eikosany. This creates a scale of 1 15/14 13/12 143/126 65/56 11/9 5/4 55/42 143/108 715/504 13/9 55/36 65/42 11/7 5/3 143/84 65/36 11/6 13/7 55/28 2/1, with steps of 15/14 91/90 22/21 45/44 616/585 45/44 22/21 91/90 15/14 56/55 55/52 78/77 66/65 35/33 143/140 35/33 66/65 78/77 55/52 56/55. This is essentially a nonatonic scale where each of the degrees has 2 or 3 notes a comma apart to choose from. While it does have 6 perfect fifths, it only has wolf ones above and below the root note, which means it requires rotating to find a stable mode to centre your playing upon, making it one of the trickier scales of its size to work with.
! 3-7-9-11-13-15_Eikosany.scl ! 3 7 9 11 13 15 3-combination Eikosany 20 ! 119.442 138.572 219.109 258.015 347.407 386.313 466.850 485.980 605.423 636.617 733.721 756.060 782.492 884.358 921.064 1022.931 1049.362 1071.701 1168.805 1200