Eleventh

File:Perfect eleventh on C.png

Perfect eleventh on C. Template:ErrorTemplate:Category handler

File:Augmented eleventh on C.png

Augmented eleventh on C. Template:ErrorTemplate:Category handler

Template:Short descriptionTemplate:Template other In music theory, an eleventh is a compound interval consisting of an octave plus a fourth.

A perfect eleventh spans 17 and the augmented eleventh 18 semitones, or 10 steps in a diatonic scale.

Since there are only seven degrees in a diatonic scale, the eleventh degree is the same as the subdominant (IV). The eleventh is considered highly dissonant with the major third.

An eleventh chord is the stacking of five thirds in the span of an eleventh. In common practice tonality, it usually had subdominant function as minor eleventh chord on the second degree (supertonic) of the major scale.

The quarter tone scale offers an alternative eleventh of 1650 cents, which is very close to the just interval 11:4, the undecimal eleventh (1651.3 cents).

See also

• Eleventh chord
• Extended chord