Major seventh
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Template:Infobox Interval A major seventh is the larger of two commonly occurring musical intervals that span seven diatonic scale degrees. The prefix 'major' identifies it as being the larger of the two (by one semitone); its smaller counterpart being a minor seventh. The major seventh is abbreviated as M7 and its inversion is the minor second. It occurs most commonly built on the root of major triads, resulting in the chord type also known as major seventh.
A major seventh in just intonation most often corresponds to a pitch ratio of 15:8 or 1:1.875, or various other ratios, while in an equal tempered tuning it is a ratio of 1:211/12 (approximately 1.887), or 1100 cents, 11.731 cents sharp of 15:8.
The major seventh is considered one of the most dissonant intervals after its inversion the minor second.
See also
Template:Diatonic intervals </br>