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63/55
|0 2 -1 1 -1>
235.1043 cents
sound sample

63/55, the werckismic supermajor second, is 441/440 (3.9 cents) sharp of 8/7, and 3025/3024 (0.57 cents) flat of 55/48. It can arise in 11-limit scales as the interval between 10/9 and 14/11, and 11/9 and 7/5, and their inversions.