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An interval spanning seven diatonic degrees, eleven semitones. An octave above C would be C. The frequency of a note one octave above another will have exactly twice as many Hertz as the frequency of the note an octave below it. In the example below, Middle C (the lower note) is 261.63 hertz and the C shown an octave higher is 523.25 hertz.
See more about pitch frequencies in the Appendix. 


See Also

[German] Oktave (f)
[Italian] ottava


Last Updated: 2016-06-05 23:59:29