4/1: Difference between revisions

@@ Line 1: / Line 1: @@
-'''4/1'''
+{{Infobox Interval
-|2&gt;
+| Name = 4th harmonic, double octave, perfect fifteenth, tetrave, quadruple
+| Color name = wa 15th
+| Sound = jid_4_1_pluck_adu_dr110.mp3
+}}
+{{Wikipedia| Fifteenth }}
-.0000 cents
+'''4/1''', the '''4th harmonic''', '''double octave''', '''perfect fifteenth''', '''tetrave''' or '''quadruple''', is the [[harmonic]] past [[3/1]] and before [[5/1]]. It is the first composite harmonic, equal to a stack of two [[octave]]s: ([[2/1]])<sup>2</sup>.
-[[File:jid_4_1_pluck_adu_dr110.mp3]] [[:File:jid_4_1_pluck_adu_dr110.mp3|sound sample]]
+It can act as the [[interval of equivalence]] in temperaments that omit every other octave, such as [[meansquared]].
-The 4th harmonic; two octaves ([[2/1|2/1]] * 2/1).
+== See also ==
+* [[Ed4]] – equal divisions of the 4th harmonic
+[[Category:Taxicab-2 intervals]]