Chords

Ab Major sharp eleventh (lydian)

Ab · C · Eb · G · Bb · D

Ab Major sharp eleventh (lydian) (Abmaj9#11) is a major chord of 6 notes: Ab · C · Eb · G · Bb · D.

Also written AbΔ9#11 · Ab^9#11

Ab Major sharp eleventh (lydian)

Ab · C · Eb · G · Bb · D

Play it on your instrument
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Voicings on the piano
VoicingNotesPlay it on your instrument
Closed, root positionAb3 · C4 · Eb4 · G4 · Bb4 · D5
Open (drop 2)Ab3 · Bb3 · C4 · Eb4 · G4 · D5
ShellAb3 · C4 · G4
RootlessC3 · G3 · Bb3 · D4

Tap a key or a fret to hear it.

Anatomy

Ab Major sharp eleventh (lydian) (Abmaj9#11) contains the notes Ab · C · Eb · G · Bb · D, each with a role measured as an interval from the root.

Read on: how triads are built · seventh chords · extensions

Inversions

An inversion of Ab Major sharp eleventh (lydian) puts a chord tone other than Ab in the bass; the name after the slash is that bass note.

Where it lives

The keys and the scales Ab Major sharp eleventh (lydian) belongs to.

In which keys

Ab Major sharp eleventh (lydian) is diatonic to 2 keys; the numeral is its degree and the label its harmonic function.

Extensions beyond the seventh count when every note sits in the key.

Scales that contain it

Ab Major sharp eleventh (lydian) fits inside these scales, each built on Ab.

Understanding the Ab Major sharp eleventh (lydian) chord

Names and symbols

Abmaj9#11 is the chord symbol for Ab Major sharp eleventh (lydian); it is also written AbΔ9#11, Ab^9#11.

maj7, M7, Δ7, ma7 and ^7 all mean the major seventh. A lowercase m7 is a different chord, the minor seventh, so the capital letter and the triangle are the only things keeping the two apart on a chart.

Common questions

What notes are in the Ab Major sharp eleventh (lydian) chord?
The Ab Major sharp eleventh (lydian) chord contains the notes Ab · C · Eb · G · Bb · D: the root Ab with the intervals 1P, 3M, 5P, 7M, 9M, 11A stacked above it. Play them together for the chord or one after another for an arpeggio. The lowest note is normally Ab, but any chord tone can take the bass in an inversion.
What intervals make up the Ab Major sharp eleventh (lydian) chord?
Measured from Ab, the Ab Major sharp eleventh (lydian) chord stacks the intervals 1P, 3M, 5P, 7M, 9M, 11A. The quality of the third and of the seventh, if there is one, is what gives the chord its character; the rest of the notes colour it. Every interval in the formula links to its own page, with its sound.
How do I play the Ab Major sharp eleventh (lydian) chord?
On guitar the most common Ab Major sharp eleventh (lydian) shape is 431333, read from the lowest string to the highest; the instrument panel above shows several more with their fingerings. On piano play Ab3 · C4 · Eb4 · G4 · Bb4 · D5 with the right hand, or move the root down into the left hand and keep the rest above it. Every shape on this page plays when you press it.

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