40/21: Difference between revisions
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{{Infobox Interval | {{Infobox Interval | ||
| Name = septimal acute major seventh, small septimal diminished octave | |||
| Color name = ry7, ruyo 7th | |||
| Name = small septimal | |||
| Color name = | |||
| Sound = jid_40_21_pluck_adu_dr220.mp3 | | Sound = jid_40_21_pluck_adu_dr220.mp3 | ||
}} | }} | ||
'''40/21''' is a [[7-limit]] interval. | '''40/21''', the '''septimal acute major seventh''', is a [[7-limit]] interval measuring about 1115.5 cents. | ||
[[ | == Terminology == | ||
[[ | Despite being approximated by the diminished octave in systems like [[septimal meantone]], and even being called the '''small septimal diminished octave''' by some musicians due to analogy with [[21/20]] being called the "large septimal chroma", 40/21 is a major seventh in just intonation notation systems such as [[Sagittal notation]], [[Helmholtz-Ellis notation]] and [[Functional Just System]], viewed as the [[243/128|Pythagorean major seventh (243/128)]] altered by [[5120/5103]]. | ||
[[Category: | == Approximation == | ||
{{Interval edo approximation|40/21}} | |||
== See also == | |||
* [[21/20]] – its [[octave complement]] | |||
* [[Gallery of just intervals]] | |||
[[Category:Seventh]] | |||
[[Category:Major seventh]] | |||