28/15: Difference between revisions

@@ Line 1: / Line 1: @@
-'''28/15'''
+{{Infobox Interval
-|2 -1 -1 1&gt;
+| Name = septimal grave major seventh
+| Color name = zg8, zogu octave
+| Sound = jid_28_15_pluck_adu_dr220.mp3
+}}
-.5572 cents
+'''28/15''' is a [[7-limit]] [[just intonation]] interval of about 1080.6 [[cent]]s. It is well approximated by [[10edo]] (9\10).
-[[File:jid_28_15_pluck_adu_dr220.mp3]] [[:File:jid_28_15_pluck_adu_dr220.mp3|sound sample]]      [[Category:todo:expand]]
+== 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 the [[Functional Just System]], viewed as the Pythagorean diminished octave ([[4096/2187]]) altered by [[5120/5103]].
+== Approximation ==
+{{Interval edo approximation|28/15}}
+== See also ==
+* [[15/14]] – its [[octave complement]]
+* [[Gallery of just intervals]]
+[[Category:Seventh]]
+[[Category:Major seventh]]
+[[Category:Octave]]
+[[Category:Diminished octave]]
+{{todo|improve synopsis}}