Meantone kleisma
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Meantone kleisma is a meantone interval of +19 fifths. It arises as an augmented augmented seventh.
+19 fifths in meantone, a meantone kleisma, is 1162261467/1073741824, and 71744535/67108864, but also 4428675/4194304, 273375/262144, 16875/16384, 3125/3072, 15625/15552, 78125/78732.
In septimal meantone where aside from 81/80 also 126/125 and 225/224 are tempered out, the meantone kleisma is also 875/864, 525/512, 4375/4374, 245/243, 19600/19683, 49/48, 686/675, 1029/1000.
- In undecimal meantone, the meantone kleisma is also 33/32 and 55/54 and 77/75.
- In undecimal meanpop, the meantone kleisma is also 56/55 and 100/99 and 45/44