Ninth

From Wikipedia, the free encyclopedia

In music or music theory a ninth is the note nine scale degrees from the root of chord (counting the root itself) and also the interval between the root and the ninth.

In tonal music of common practice, the ninth is heard as a dissonance. A ninth is a compound second, but the ninth is considered more dissonant than the second.

Image:Ninth chord.gif

Ninth chord

A ninth chord is a chord with a ninth, and is an extended chord. Typically, a ninth chord also includes the seventh along with the basic triad structure. Thus, a C9 consists of C E G B♭ and D. Added tone chords with what might be called an added second are usually said to have an added ninth, two fifths up from the root.

Chords


By Type	Triad	Major · Minor · Augmented · Diminished · Suspended

	Seventh	Major · Minor · Dominant · Diminished · Half-diminished · Minor-major · Augmented major · Augmented minor

	Extended	Ninth · Eleventh · Thirteenth

	Other	Sixth · Augmented sixth · Altered · Added tone · Polychord · Quartal and quintal · Tone cluster· Power

By Function	Diatonic	Tonic · Dominant · Subdominant · Submediant

	Altered	Borrowed · Neapolitan chord · Secondary dominant · Secondary subdominant