How to Play Piano Chord: G♯ half-diminished 7 flat 9 — root | PianoKitty

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G♯m7♭5♭9

root position

G♯ half-diminished 7 flat 9

root position

Notes

G♯, B, D, F♯, A

Parent major scale: G♯

The notes of the G♯ major scale are:

#	Note	Function
1	G♯	root
2	A♯	second
3	C	third
4	C♯	fourth
5	D♯	fifth
6	F	sixth
7	G	seventh
8	G♯	octave
9	A♯	ninth

Major scale pattern

The semitone pattern for a major scale is:

WWHWWWH

where:

W = Whole step (2 semitones)
H = Half step (1 semitone)

half-diminished 7 flat 9 chord pattern

1, ♭3, ♭5, ♭7, ♭9

root	G♯
flat third	B
flat fifth	D
flat seventh	F♯
flat ninth	A

Similar chords

G♯ half-diminished 7 with a minor 3rd added on top (3 semitones)
G♯ minor 7 flat 9 with raised fifth

Upper structures

G♯ diminished + A♭ (notes overlap)

Play it as two chords

D major G♯ · F♯

D–F♯–A = ♭5, ♭7, ♭9 · left hand: root + ♭7
B minor G♯ · F♯

B–D–F♯ = ♭3, ♭5, ♭7 · left hand: root + ♭7

Practice the half-diminished 7 flat 9 chords Practice all inversions of G♯m7♭5♭9

The keyboard can of every chord — change it any time in Preferences.