Perfect fourth: Difference between revisions

Rework the intro to address the abstract approach
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As a concrete [[interval region]], it is typically near 500 cents in size, distinct from the [[semiaugmented fourth]] of roughly 550 cents. A rough tuning range for the perfect fourth is about 470 to 530 cents according to [[Margo Schulter]]'s theory of interval regions. Another common range is the stricter range from 480 to 514 cents, which generates a diatonic scale.
As a concrete [[interval region]], it is typically near 500 cents in size, distinct from the [[semiaugmented fourth]] of roughly 550 cents. A rough tuning range for the perfect fourth is about 470 to 530 cents according to [[Margo Schulter]]'s theory of interval regions. Another common range is the stricter range from 480 to 514 cents, which generates a diatonic scale.
This article covers intervals from 450 to 550 cents, in order to cover the range of intervals without needing extra articles for subfourths or superfourths.


== In just intonation ==
== In just intonation ==