2.3.7 subgroup: Difference between revisions

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* Ratios with a 7 in the numerator (7-over or '''zo''' in color notation) sound [[Supermajor and subminor|subminor]]

* Ratios with a 7 in the denominator (7-under or '''ru''' in color notation) sound supermajor

If one wishes to use color notation, these qualities may be remembered by thinking of ru as "red" (sharp, alarmed, bright) and zo as "azure" (moody, dark).

This subgroup is notably well-represented by [[5edo]] for its size, and therefore many of its simple intervals tend to cluster around the notes of 5edo: [[9/8]]~[[8/7]]~[[7/6]] representing a pentatonic "second", [[9/7]]~[[21/16]]~[[4/3]] representing a pentatonic "third", and so on. Therefore, one way to approach the 2.3.7 subgroup is to think of a pentatonic framework for composition as natural to it, rather than the diatonic framework associated with the [[5-limit]], and a few of the scales below reflect that nature.

@@ Line 15: / Line 15: @@
 * Ratios with a 7 in the numerator (7-over or '''zo''' in color notation) sound [[Supermajor and subminor|subminor]]
 * Ratios with a 7 in the denominator (7-under or '''ru''' in color notation) sound supermajor
+If one wishes to use color notation, these qualities may be remembered by thinking of ru as "red" (sharp, alarmed, bright) and zo as "azure" (moody, dark).
 This subgroup is notably well-represented by [[5edo]] for its size, and therefore many of its simple intervals tend to cluster around the notes of 5edo: [[9/8]]~[[8/7]]~[[7/6]] representing a pentatonic "second", [[9/7]]~[[21/16]]~[[4/3]] representing a pentatonic "third", and so on. Therefore, one way to approach the 2.3.7 subgroup is to think of a pentatonic framework for composition as natural to it, rather than the diatonic framework associated with the [[5-limit]], and a few of the scales below reflect that nature.