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Deutsch

The large septimal or slendro diesis, 49/48 (35.6968 cents), is a superparticular ratio spanning the small distance between a subminor third of 7/6 and a supermajor second of 8/7. It is tempered out in 15edo and 19edo, where the two intervals are equated. It cannot be tempered out if all of the consonances of the 7-limit are distinct, but it can be equated with other commas; for example (49/48)/(81/80) = 245/243, (49/48)/(64/63) = 1029/1024, (49/48)/(3125/3072) = 3136/3125, (49/48)/(50/49) = 2401/2400, (128/125)/(49/48) = 6144/6125, (36/35)/(49/48) = 1728/1715.


http://en.wikipedia.org/wiki/Septimal_diesis