Major seventh chord: Difference between revisions
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list 3-limit later, since the 243-odd 3-limit chord appears to be a tempered approximation of the 15-odd 5-limit one |
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A '''major seventh chord''' is a [[tetrad]] comprising a root, [[major]] third, [[perfect]] fifth, and major seventh. | A '''major seventh chord''' is a [[tetrad]] comprising a root, [[major]] third, [[perfect]] fifth, and major seventh. | ||
== | == In just intonation == | ||
In the [[5-limit]]: | In the [[5-limit]]: | ||
Revision as of 05:11, 14 August 2024
A major seventh chord is a tetrad comprising a root, major third, perfect fifth, and major seventh.
In just intonation
In the 5-limit:
- 8:10:12:15 is found on on the I (1⁄1) and IV (4⁄3) of Ptolemy's intense diatonic scale (Zarlino), perhaps the most common 5-limit diatonic.
In the 3-limit:
- 128:162:192:243 spans five octave-reduced fifths, and may be considered a 3-limit approximation of 8:10:12:15.