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Sequence of Five 3 quarter tones in persian music is a perfect 5th! 3/4 tone = 140 cents

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A musical octave is 6 chromatic whole tones, each whole tone is 200 cents. A perfect fifth (the interval between C and G) is 701 cents. Since a Persian 3/4 tone interval is 140 cents, a sequence of five 3/4 tones provides a perfect 5th. Interestingly, a minor third ( interval between c to E flat) in Persian music is flatter than a diatonic or chromatic minor third and is about 280 cents which happens to be double the 3/4 tone of 140 cents).Octave= 12 half tones
Chromatic half tone = 100 cents
Pefect fifth interval (Do -Sol) = 701 cents
Persian PARDEH or whole tone= 220 cents
Persian 3/4 tone = 140 cents = 701 cents / 5
Persian minor third (1.5 PARDEH) is 280= 2x140 cents!

In ratios: a 3/4 tone interval is a pitch or string ratio of13/12 and five times that in ratios means (13/12) to the 5th power which is a 3/2 ratio.
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