CadenzaA♭ seventh, sharp eleven
A♭7(♯11)
Also written G♯7(♯11) · A♭7♭5 · Ab7#11
Lydian dominant: the ♯11 (D) replaces the 4th. It is the IV7 of E♭ melodic minor and the natural sound of a tritone substitute — A♭7(♯11) often stands in for D7, falling a semitone to G.
How pianists voice A♭7(♯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 Cø7 — the bass turns them into A♭7(♯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.
Seventh, sharp eleven chords in every key
Every A♭ chord
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