4:5:6: Difference between revisions
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on 2nd thought, deleted the 11-limit chord, not nearly as common as the other ones. |
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* [[20:25:30:36]] adds 9/5 | * [[20:25:30:36]] adds 9/5 | ||
* [[4:5:6:7]] adds 7/4 (7-limit) | * [[4:5:6:7]] adds 7/4 (7-limit) | ||
[[Category:Major triads|#]] <!-- 1-digit first number --> | [[Category:Major triads|#]] <!-- 1-digit first number --> | ||
Revision as of 04:15, 29 October 2025
| Chord information |
4:5:6 is the classical major triad, also known as the Ptolemaic major triad. It has the lowest odd limit of all the JI triads.
It is found on the I (1⁄1), IV (4⁄3), and V (3⁄2) of Ptolemy's intense diatonic scale (Zarlino), a very common 5-limit diatonic.
Common tetrads based on this triad (5-limit except where noted):
- 12:15:18:20 adds 5/3
- 8:10:12:15 adds 15/8
- 36:45:54:64 adds 16/9
- 20:25:30:36 adds 9/5
- 4:5:6:7 adds 7/4 (7-limit)