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Encyclopedia > Major seventh

The musical interval of a Major seventh the first note (the root or tonic) and the seventh, the leading tone, in a major scale. It is the inversion of the minor second. It is abbreviated as M7.


It can be produced by starting on a high note and playing the seventh below or by starting on a low note and playing the seventh above.


A Major seventh in just intonation 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 the second most dissonant interval after its inversion the minor second.


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  Results from FactBites:
 
Seventh chord - Wikipedia, the free encyclopedia (805 words)
Called the Dominant Seventh because its intervallic relationships occur naturally in the seventh chord built on the dominant scale degree of a given key (e.g., G7 in the key of C major), the dominant seventh chord was the first to begin to appear regularly in Western music.
The dominant seventh chord is useful to composers because it is a major chord with a very strong sound, that also includes a tritone between the third and seventh of the chord.
While the dominant seventh chord is typically built on the fifth (or dominant) degree of a major scale, the minor seventh chord is built on the second, third, or sixth degree.
Major seventh - Wikipedia, the free encyclopedia (214 words)
The prefix 'major' identifies it as being the larger of the two (by one chromatic semitone); its smaller counterpart being a minor seventh.
The major seventh is abbreviated as M7 and its inversion is the minor second.
The major seventh is considered one of the most dissonant intervals after its inversion the minor second.
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