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49/45
|0 -2 -1 2>
147.428097 cents

49/45, the swetismic neutral second, is 540/539 (3.2 cents) flatter than 12/11, and appears in 7-limit scales as the interval between 15/14 and 7/6, and 9/7 and 7/5, and their inversions. It therefore represents one of the ways approximate 11-limit harmony appears in 7-limit scales.