28/15: Difference between revisions

Xenwolf (talk | contribs)
introduced infobox, added some information and cats
Replace "diatonic" by "grave" by analogy to 40/21 being called "acute" ("diatonic" here doesn't make any sense), and move this suboptimal name to the terminology section
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| Monzo = 2 -1 -1 1
| Monzo = 2 -1 -1 1
| Cents = 1080.55719
| Cents = 1080.55719
| Name = septimal diatonic major seventh
| Name = septimal grave major seventh
| Color name =  
| Color name =  
| FJS name = d8<sup>7</sup><sub>5</sub>
| FJS name = d8<sup>7</sup><sub>5</sub>
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}}
}}


'''28/15''', the '''septimal diatonic major seventh''', is a [[7-limit]] just interval of about 1080.6 [[cent]]s.
'''28/15''' is a [[7-limit]] just interval of about 1080.6 [[cent]]s. It is well approximated by [[10edo]] (9\10).
 
== Terminology ==
Despite being approximated by the major seventh in systems like [[septimal meantone]], and even being called the '''septimal grave major seventh''' by some musicians, 28/15 is a diminished octave in just intonation notation systems such as [[Sagittal notation]], [[Helmholtz-Ellis notation]] and [[Functional Just System]], viewed as the [[4096/2187|Pythagorean diminished octave (4096/2187)]] altered by [[5120/5103]].  


== See also ==
== See also ==
 
* [[15/14]] – its [[octave complement]]
* [[Gallery of just intervals]]
* [[Gallery of just intervals]]
* [[15/14]] – its [[octave complement]]
* [[10edo]] has a good approximation


[[Category:7-limit]]
[[Category:7-limit]]
[[Category:Interval ratio]]
[[Category:Interval]]
[[Category:Listen]]
[[Category:Ratio]]
[[Category:Seventh]]
[[Category:Seventh]]
[[Category:Major seventh]]
[[Category:Major seventh]]
[[Category:Pages with internal sound examples]]


[[Category:Todo:expand]]
{{todo| expand | improve synopsis | add color name }}
[[Category:Todo:improve synopsis]]
[[Category:Todo:add color name]]