20:25:30:36: Difference between revisions
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{{Infobox Chord|20:25:30:36|Name = major-minor seventh}} | |||
The '''major-minor seventh chord''' is a [[tetrad]] in [[5-limit]] harmony, tuned 20:25:30:36 (1⁄1–5⁄4–3⁄2–9⁄5) and sometimes considered a form of [[dominant seventh chord]]. It combines a [[5/4]] major third with the consonant [[9/5]] seventh that would be found in a [[Ptolemaic minor seventh chord]] on the same root, creating a [[36/25]] tritone between the two. | The '''major-minor seventh chord''' is a [[tetrad]] in [[5-limit]] harmony, tuned 20:25:30:36 (1⁄1–5⁄4–3⁄2–9⁄5) and sometimes considered a form of [[dominant seventh chord]]. It combines a [[5/4]] major third with the consonant [[9/5]] seventh that would be found in a [[Ptolemaic minor seventh chord]] on the same root, creating a [[36/25]] tritone between the two. | ||
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[[Category:Dominant seventh chords]] | [[Category:Dominant seventh chords]] | ||
[[Category:Tetrads]] | [[Category:Tetrads]] | ||
[[Category:Essentially tempered chords]] | [[Category:Essentially tempered chords]] | ||
Revision as of 04:09, 12 August 2024
| Chord information |
The major-minor seventh chord is a tetrad in 5-limit harmony, tuned 20:25:30:36 (1⁄1–5⁄4–3⁄2–9⁄5) and sometimes considered a form of dominant seventh chord. It combines a 5/4 major third with the consonant 9/5 seventh that would be found in a Ptolemaic minor seventh chord on the same root, creating a 36/25 tritone between the two.
The major-minor seventh chord is found rooted at 1⁄1 (I) and 4⁄3 (IV) in the duodene.
In septimal meantone, the 36/25 tritone is equated with the more consonant interval 10/7, and the major-minor seventh chord becomes an essentially tempered chord in the 9-odd-limit.