- Major fourth
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In music, a major fourth (
Play (help·info)) is the interval from the quarter tone scale, named by Ivan Wyschnegradsky, between the perfect fourth (500 cents) and the augmented fourth (600 cents) and thus 550 cents. It inverts to a minor fifth.
The term may also be applied to the ratio 45:32 or 590.22 cents (
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Sources
- ^ Richard Mackenzie Bacon (1821). "Manuscript Work of Francesco Bianchl", The Quarterly Musical Magazine and Review, Volume 3, p.56.
Intervals (list) Numbers in brackets are the number of semitones in the interval.
Fractional semitones are approximate.Twelve-semitone
(Western)PerfectMajorMinorAugmentedDiminishedCompoundOther systems SupermajorNeutralSubminor7-limitchromatic semitone (⅔) · diatonic semitone (1⅙) · whole tone (2⅓) · subminor third (2⅔) · supermajor third (4⅓) · harmonic (subminor) seventh (9⅔)Other intervals GroupsPythagorean comma · Pythagorean apotome · Pythagorean limma · Diesis · Septimal diesis · Septimal comma · Syntonic comma · Schisma · Diaschisma · Major limma · Ragisma · Breedsma · Kleisma · Septimal kleisma · Septimal semicomma · Orwell comma · Semicomma · Septimal sixth-tone · Septimal quarter tone · Septimal third-tone
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