1/3-comma meantone

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1/3-comma meantone is the tuning of meantone temperament in which each perfect fifth is tempered by a third of a syntonic comma from its just value of 3/2. This results in minor thirds being exactly 6/5 (and major sixths being exactly 5/3). In other words, 1/3-comma meantone is the specific tuning of meantone temperament with an eigenmonzo (unchanged-interval) of 6/5. The fifth is 694.786 cents in size, and the major third 379.145 cents. Both are flat by 1/3 syntonic comma (c. 7.2 cents) than that in the JI. 1/3-comma meantone is practically identical to the closed system of 19edo (although technically there is a slight difference).

Tuning profile

Projection map:

[⟨ 1 4/3 4/3 1/3 ]
0 -1/3 -4/3 -10/3 ]
0 1/3 4/3 10/3 ]
0 0 0 0 ]]

Tuning map: 1200 1894.7862 2779.1450 3347.8624]

Mistuning map: 0 -7.1688 -7.1688 -20.9635]

External links