Schisma

The musical interval by which eight fifths and a major third exceed five octaves,

$${({\textstyle{3\over 2}})^8({\textstyle{5\over 4}})\over 2^5... ...8\cdot 5\over 2^{15}} = {32805\over 32768} = 1.00112915\ldots.$$

See also Comma of Didymus, Comma of Pythagoras, Diesis