! mersen-ban.scl
!
For keyboard designs of Mersenne (1635) & Ban (1639), 10 black and extra D. Traité, p. 44-45
 18
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 25/24
 16/15
 10/9
 9/8
 75/64
 6/5
 5/4
 4/3
 25/18
 45/32
 3/2
 25/16
 8/5
 5/3
 16/9
 9/5
 15/8
 2/1