Well tempered nonet

A well tempered nonet ^{[idiosyncratic term ]} is a kind of nonoctave scale created by Joseph Ruhf. They optimally repeat at an interval of around 1300-1500 cents and their optimal patent tunings target the nonet of a Kartvelian scale where a 3/2 is available. They also solve tritone correction parsimoniously by shifting the emphasized degrees of the scale.