G#7#9 Guitar Chord | Play, Hear and Practice Interactively
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G#7#9 (G# seventh sharp nine) is spelled G#, B#, D#, F# and A##: a root, a major third, a perfect fifth, a minor seventh and a sharp ninth.
Out of three voicings on this page, two of them are barre shapes and none of them uses an open string. Ab7#9 is its enharmonic twin, with the same pitches and different note names. Every tone of G#7#9 sits inside the G# Half-Whole scale, the eight-note scale built from alternating half steps and whole steps, so it is a natural pool of notes for lines over the chord.
The fretboard at the top labels every note of each shape, so you can see where G#, B# and A## fall.
G# 7th with sharp 9th guitar chord is also written as G#7(#9), G#7#9 or G#7+9. It is also known as the Hendrix chord.
G# 7(#9) chord Notes:
Tones in the Dominant Seventh Sharp Ninth Added chord:
Formula: 1 3 5 b7 #9
G# 7(#9) Guitar Chord Diagrams
Position 1 Barre Movable
Finger Positions
- Place your index finger (1) on the fret 3 of the A string
- Place your middle finger (2) on the fret 4 of the low E string
- Place your ring finger (3) on the fret 4 of the D, G, B and high E strings at the same time
Position 2 Barre Movable
Finger Positions
- Place your index finger (1) on the fret 4 of the low E, D and B strings at the same time
- Place your middle finger (2) on the fret 5 of the G string
- Place your ring finger (3) on the fret 6 of the A string
- Place your pinky finger (4) on the fret 7 of the high E string
Position 3 Movable
Finger Positions
- Mute the low E string
- Mute the high E string
- Place your index finger (1) on the fret 10 of the D string
- Place your middle finger (2) on the fret 11 of the A string
- Place your ring finger (3) on the fret 11 of the G string
- Place your pinky finger (4) on the fret 12 of the B string
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Created by
Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher
FAQ
Which notes form the G# seventh sharp nine chord?
G#, B#, D#, F# and A##. The B# is the major third and sounds like C, and the A## is the sharp ninth and sounds like B.
Is G#7#9 the same chord as Ab7#9?
Yes. Ab7#9 is spelled Ab, C, Eb, Gb and B, which needs no sharps beyond the plain B, while G#7#9 uses G#, B#, D#, F# and A##. The sound is identical.
Why does G#7#9 include B# and A##?
The third needs the letter B and the ninth the letter A. A major third from G# is B#, which sounds like C, and the sharp ninth is A##, which sounds like B.
What scale fits G#7#9?
The G# Half-Whole scale: G#, A, A##, B#, C##, D#, E# and F#. Its eight notes alternate half and whole steps and include all five chord tones.
How many voicings can I find for G#7#9?
Three voicings are listed, from the third fret to the twelfth fret. Two of them are barre voicings, and none uses open strings.
