CadenzaA♭ major seventh, sharp eleven
A♭maj7(♯11)
Also written G♯maj7(♯11) · A♭Δ7(♯11) · A♭ Lydian · Abmaj7#11
Lydian: the ♯11 (D) replaces the 4th, which would clash with the 3rd. It is the IV chord of E♭ major, and a tonic when a major 7th needs more light.
How pianists voice A♭maj7(♯11)
Nobody plays a jazz chord in root position. These are the shapes that actually get played — the same ones Cadenza shows when you play the chord.
Shell Left hand
1 · 3 · 7 — root, 3rd and 7th: the three notes that say what the chord is. Left hand, low; everything else is colour.
Rootless A From the 3rd
3 · 5 · 7 · 9 — no root: the bass player has it. The left-hand voicing of modern jazz piano. Without A♭ underneath, the same keys read as Cm7 — the bass turns them into A♭maj7(♯11).
Rootless B From the 7th
7 · 9 · 3 · 5 — the other half of the pair. A and B alternate through a ii–V–I so the hand barely moves.
Drop 2 Two hands
5 · 1 · 3 · 7 — close position with the second voice from the top dropped an octave: wider, warmer, the standard for chord melody.
Major seventh, sharp eleven chords in every key
Every A♭ chord
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