Editing Ditone (section)

{{Short description|Interval in music}}
{{see also|Major third}}
[[Image:Ditone on C.png|thumb|Pythagorean ditone on C {{audio|Pythagorean major third on C.mid|Play}}]]
[[Image:Ditone.png|thumb|Pythagorean ditone as four just perfect fifths]]

In [[music]], a '''ditone''' ({{Langx|la|ditonus}}, from {{Langx|grc|δίτονος}}, "of two tones") is the [[interval (music)|interval]] of a [[major third]]. The size of a ditone varies according to the sizes of the two tones of which it is compounded. The largest is the Pythagorean ditone, with a ratio of 81:64, also called a comma-redundant major third; the smallest is the interval with a ratio of 100:81, also called a comma-deficient major third.<ref>Abraham Rees, "Ditone, Ditonum", in ''The Cyclopædia, or Universal Dictionary of Arts, Sciences, and Literature. In Thirty-Nine Volumes'', vol. 12 (London: Longman, Hurst, Rees, Orme, & Brown, 1819) [not paginated].</ref>