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''', 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 "whole tone", i.e. the large step in the [[4L 5s (3/1-equivalent)|Lambda scale]]. | ||
== See also == | == See also == | ||