4/1: Difference between revisions
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{{Wikipedia| Fifteenth }} | {{Wikipedia| Fifteenth }} | ||
'''4/1''', the '''4th harmonic''', '''double octave''','''perfect fifteenth''', '''tetrave''' or '''quadruple''', is the [[harmonic]] past [[3/1]] and before [[5/1]]. It is equal to a stack of two [[octave]]s: ([[2/1]])<sup>2</sup>. | '''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>. | ||
It can act as the [[interval of equivalence]] in temperaments that omit every other octave, such as [[meansquared]]. | It can act as the [[interval of equivalence]] in temperaments that omit every other octave, such as [[meansquared]]. | ||