CadenzaG seventh, flat nine, flat thirteen
G7(♭9♭13)
Also written G7b9b13
Both minor-key tensions on one dominant: the ♭9 (A♭) and ♭13 (E♭) are the ♭6 and ♭3 of C minor, where G7(♭9♭13) resolves. It is the V chord straight out of C harmonic minor.
How pianists voice G7(♭9♭13)
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 · ♭13 · ♭7 · ♭9 — no root: the bass player has it. The left-hand voicing of modern jazz piano.
Rootless B From the 7th
♭7 · ♭9 · 3 · ♭13 — the other half of the pair. A and B alternate through a ii–V–I so the hand barely moves. Without G underneath, the same keys read as Fø7 — the bass turns them into G7(♭9♭13).
Drop 2 Two hands
♭13 · 1 · 3 · ♭7 — close position with the second voice from the top dropped an octave: wider, warmer, the standard for chord melody.
Seventh, flat nine, flat thirteen chords in every key
Every G chord
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