In music, a ninth is a compound interval consisting of an octave plus a second.

Like the second, the interval of a ninth is classified as a dissonance in common practice tonality. Since a ninth is an octave larger than a second, its sonority level is considered less dense.

Read more about NinthMajor Ninth, Minor Ninth, Augmented Ninth, Ninth Chords

Other articles related to "ninth":

Ninth Chords
... Three types of ninth chords may be distinguished dominant (9), major (M9), and minor (m9) ... in both major and minor, thus 7 ... t + 2 = dominant seventh + ninth = dominant ninth chord 7 ... e + 2 = major seventh + ninth = major ninth chord 7 ... t + 2 = minor seventh ...

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