5-7-11-15 by 18/11 bihexany
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A 15-odd-limit Hexany. This creates a scale of 1 15/14 11/10 33/28 27/22 9/7 3/2 11/7 18/11 135/77 9/5 27/14 2/1, with steps of 15/14 77/75 15/14 126/121 22/21 7/6 22/21 126/121 15/14 77/75 15/14 28/27. This neatly fills out one of the gaps in the base hexany without adding any intervals that are smaller than the existing smallest step, and cancelling some of the factors to keep most intervals fairly simple. However, it does leave a gap of 7/6 on one side of the scale, more than twice as large as any of the other steps, which is very noticeable when contrasted with the others.
! 5-7-11-15_by_18/11_Bihexany.scl ! 5 7 11 15 by 18/11 2-combination Bihexany 12 ! 119.442 165.004 284.447 354.547 435.084 701.955 782.492 852.592 972.034 1017.596 1137.039 1200