Eleventh

This article is about an eleventh in music theory. For the chord, see Eleventh chord. For the character, see Eleventh Doctor. For the century, see 11th century. For the US constitution amendment, see Eleventh Amendment to the United States Constitution. For 11 July in Northern Ireland, see Eleventh night.

Perfect eleventh on C. Play 

perfect eleventh

Inverse	perfect fifth
Name
Other names	Compound fourth
Abbreviation	P11
Size
Semitones	17
Cents
Equal temperament	1700.0

Augmented eleventh on C. Play 

augmented eleventh

Inverse	diminished fifth
Name
Abbreviation	A11
Size
Semitones	18
Cents
Equal temperament	1800.0

In music or music theory, an eleventh play  is the note eleven scale degrees from the root of a chord and also the interval between the root and the eleventh. The interval can be also described as a compound fourth, spanning an octave plus a fourth.

Since there are only seven degrees in a diatonic scale the eleventh degree is the same as the subdominant.

The eleventh is considered highly dissonant with the major third.

A perfect eleventh is an eleventh which spans exactly 17 semitones. It can be also described as a compound perfect fourth, spanning an octave plus a perfect fourth.

See also

• Eleventh chord
• Suspended chord