# 2/9-comma meantone

Jump to navigation
Jump to search

**2/9-comma meantone** is a meantone tuning which flattens the perfect fifth by 4.779 cents (2/9 of a syntonic comma). This results in a fifth of 697.176 cents.

2/9-comma meantone was described by Lemme Rossi in *Sistema musico ouero Musica speculativa* (1666), and again by Moritz Wilhelm Drobisch in *Über musikalische Tonbestimmung und Temperatur* (1852). Of all the known historical temperaments, it is the closest to the optimal 5-, 7-, 11- and 13-limit CTE tunings for meantone.