A+(#11) Guitar Chord | How To Create and Play the A Augmented Fifth Sharp Eleventh added chord
The A augmented sharp eleven chord is usually written A+(#11) and uses the notes A, C#, E# and D#. A+(#11) adds the sharp eleventh to an augmented triad, so it has four notes and no seventh.
Notes such as E# are written that way to keep one letter name per chord tone, even though they sound like simpler notes. Every note of A+(#11) sits inside the A Lydian augmented scale, so that scale is the natural place to look for melody notes. Try the chord in progressions in jazz to hear how it connects to its neighbours.
The raised fifth and the sharp eleventh, E# and D#, are only a whole step apart, which gives the chord its bite.
A augmented with sharp 11th guitar chord is also written as A+(#11), Aaug(#11), A+#11 or Aaug#11.
Notes that compose the A +(#11) chord:
Chord Structure:
Formula: 1 3 #5 #11
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Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher
FAQ
Which notes form A+(#11)?
A+(#11) is spelled A, C#, E# and D#. That is a root, a major third, a raised fifth and a sharp eleventh. The E# is a theoretical spelling of a note that sounds like F.
What does the #11 in A augmented sharp eleven mean?
It means the eleventh is raised a semitone. The plain eleventh from A is D, so here it is D#. The D# lies six semitones from the root.
Which scale fits A+(#11)?
The A Whole-Tone Scale (A, B, C#, D#, E#, G) holds all four chord notes. A, C#, E# and D# are each members of it.
How is A+(#11) different from an A augmented triad?
The triad contains A, C# and E#. A+(#11) adds D# as a fourth note, so you hear the augmented sound plus a tense sharp eleventh.
