25/21: Difference between revisions
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{{Infobox Interval | {{Infobox Interval | ||
| Name = quasi-tempered minor third | | Name = quasi-tempered minor third | ||
| Color name = ryy2, ruyoyo 2nd | | Color name = ryy2, ruyoyo 2nd | ||
| Sound = jid_25_21_pluck_adu_dr220.mp3 | | Sound = jid_25_21_pluck_adu_dr220.mp3 | ||
}} | }} | ||
'''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 "BP whole tone", i.e. the large step in the [[4L 5s (3/1-equivalent)|Lambda scale]]. | |||
== See also == | == See also == | ||
* [[42/25]] - its [[octave complement]] | * [[42/25]] - its [[octave complement]] | ||
* [[63/50]] - its [[fifth complement]] | * [[63/50]] - its [[fifth complement]] | ||
* [[28/25]] – its [[fourth complement]] | |||
* [[Gallery of just intervals]] | * [[Gallery of just intervals]] | ||
* [[:File:Ji-25-21-csound-foscil-220hz.mp3]] - another sound example | * [[:File:Ji-25-21-csound-foscil-220hz.mp3]] - another sound example | ||
[[Category:Third]] | [[Category:Third]] | ||
[[Category:Minor third]] | [[Category:Minor third]] | ||
[[Category:Starling]] | [[Category:Starling]] | ||
Latest revision as of 18:13, 1 January 2025
| Interval information |
[sound info]
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 "BP whole tone", i.e. the large step in the 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