Chord · Altered Dom.

G7♭9 — G Dominant 7th ♭9

G7♭9 is the G dominant 7th ♭9 chord. It is built on the root G with major 3rd (B), perfect 5th (D), minor 7th (F) and minor 9th (A♭) above it — the formula 1 3 5 ♭7 ♭9, sounding the notes G B D F A♭. On the piano it sits at G (octave 4) and above in the library's voicing; the same 5 notes in any octave are still G7♭9.

Root
G
Quality
Dominant 7th ♭9
Formula
1 3 5 ♭7 ♭9
Notes
G B D F A♭

On the keyboard

G7♭9 on the piano keyboard: G B D F A♭GBDFA♭

The notes of G7♭9

DegreeNoteInterval from the rootPitch
1GrootG4
3Bmajor 3rdB4
5Dperfect 5thD5
♭7Fminor 7thF5
♭9A♭minor 9thA♭5

Other altered dom. on G

Dominant 7th ♭9 chords on every root

Part of the chord reference. See also the scales and the keys.