In music theory, an eleventh is a Interval (music)#Simple and compound, compound interval consisting of an octave plus a Perfect fourth, fourth.
A perfect eleventh spans 17 and the augmented eleventh 18 semitones, or 10 steps in a diatonic scale.
Since there are only seven scale degree, degrees in a diatonic scale, the eleventh degree is the same as the subdominant (IV).
The eleventh is considered highly Consonance and dissonance, dissonant with the major third.
An eleventh chord is the stacking of five List of third intervals, thirds in the span of an eleventh. In common practice period, common practice tonality, it usually had subdominant Function (music), function as minor eleventh chord on the second degree (supertonic) of the major scale.
See also
*Eleventh chord
*Extended chord
References
Chord factors
Fourths (music)
Compound intervals
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