25/21: Difference between revisions

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'''25/21''', the '''quasi-tempered minor third''', is the interval between [[6/5]] and [[10/7]], and also [[7/5]] and [[5/3]]. It is [[126/125]] flat of [[6/5]], and tempering 126/125 out makes the 1-6/5-10/7 triad into a [[diminished triad]] where two minor thirds make up a [[tritone]]. It is extremely close to 3 steps of [[12edo]] (300 cents).

25/21 is also an important interval in the [[Bohlen-Pierce scale]], where it represents a "whole tone", i.e. the large step in the [[4L 5s (3/1 equivalent)|Lambda scale]].

25/21 is also an important interval in the [[Bohlen-Pierce scale]], where it represents a "BP whole tone", i.e. the large step in the [[4L 5s (3/1-equivalent)|Lambda scale]].

== See also ==

* [[42/25]] - its [[octave complement]]

* [[63/50]] - its [[fifth complement]]

* [[28/25]] – its [[fourth complement]]

* [[Gallery of just intervals]]

* [[:File:Ji-25-21-csound-foscil-220hz.mp3]] - another sound example

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 '''25/21''', the '''quasi-tempered minor third''', is the interval between [[6/5]] and [[10/7]], and also [[7/5]] and [[5/3]]. It is [[126/125]] flat of [[6/5]], and tempering 126/125 out makes the 1-6/5-10/7 triad into a [[diminished triad]] where two minor thirds make up a [[tritone]]. It is extremely close to 3 steps of [[12edo]] (300 cents).
-/21 is also an important interval in the [[Bohlen-Pierce scale]], where it represents a "whole tone", i.e. the large step in the [[4L 5s (3/1 equivalent)|Lambda scale]].
+/21 is also an important interval in the [[Bohlen-Pierce scale]], where it represents a "BP whole tone", i.e. the large step in the [[4L 5s (3/1-equivalent)|Lambda scale]].
 == See also ==
 * [[42/25]] - its [[octave complement]]
 * [[63/50]] - its [[fifth complement]]
+* [[28/25]] – its [[fourth complement]]
 * [[Gallery of just intervals]]
 * [[:File:Ji-25-21-csound-foscil-220hz.mp3]] - another sound example