1/7-comma meantone

1/7-comma meantone is the tuning of meantone temperament which tunes the fifth as 698.883 cents. This means the fifth is flattened by 1/7 of the syntonic comma (81/80) of 21.506 cents, which is to say by 3.072 cents. It was proposed by Jean-Baptiste Romieu in 1758. It is the tuning used by Farley’s House of Pianos in Madison, and advocated by its owner Tim Farley. It is approximated near perfectly by 91edo.