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A perfect octave
Perfect
Open interval does not include its end points while closed interval includes
An interval is the spacing of time. For example: I ran for an interval of 10 minutes then walked for an interval of 30 minutes. Or each car has an interval of 0.5 seconds.
Yes, if it is the closed interval. No, if it is the open interval.
2:1
He discovered the ratio of a perfect octave is 2:1.
perfect fourth !
A perfect octave
He discovered the ratio interval of a perfect octave is 2:1.
Perfect
Perfect
Perfect fourth
Perfect
Perfect octave.
perfect fourth
An octave is defined as two notes, one of which is twice the frequency (vibrations per second) as the other; also two notes with an interval between them of 8 diatonic degrees.