G# Dominant Ninth Sharp Fifth Guitar Chord Fingering

Spelled G#, B#, D##, F# and A#, G#9#5 is the G# ninth sharp five chord, with the root, major third, raised fifth, minor seventh and ninth above its root. Compared with a plain ninth chord, only the fifth changes: it is raised by a semitone. The raised fifth leans upward, which gives the chord a bright but unsettled colour.

A scale that covers every chord tone is the G# whole-tone scale, which is where to start when you improvise. The notes B# and D## are theoretical spellings, which is why charts tend to write Ab9#5 instead. The same chord is written Ab9#5 in the enharmonic spelling, so the two pages share one sound.

G# 9th with sharp 5th guitar chord is also written as G#9(#5), G#9#5, G#9+5 or G#aug9.

G#9#5 Chord Notes and Formula

Notes of the G# 9(#5) chord:

G# B# D## F# A#

Chord Structure:

Formula: 1 3 #5 b7 9

Same chord, different name: G#9#5 is also written as Ab9#5 (Ab ninth sharp five).

G# 9(#5) Chord Interactive Fretboard

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More G# Chords

G# G#m G#7 G#m7 G#maj7 G#sus4 G#sus2 G#add9 G#dim G#9 G#9b5 G#+(#11) G#m(maj7) G#m(maj9)

Want to know how this chord is built? Read chord symbols and intervals, or browse all G# guitar chords.

Play This Chord With Other Roots

C 9(#5) | D 9(#5) | E 9(#5) | F 9(#5) | G 9(#5) | A 9(#5) | B 9(#5) | C#9(#5) | D#9(#5) | F#9(#5) | G#9(#5) | A#9(#5) | Ab9(#5) | Bb9(#5) | Db9(#5) | Eb9(#5) | Gb9(#5)

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Created by

Giancarlo Facoetti

Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher

FAQ

What are the notes of G#9#5?

G#9#5 is spelled G#, B#, D##, F# and A#. That gives the root, a major third, a raised fifth, a minor seventh and a ninth. The B# and D## are theoretical spellings.

Is G#9#5 the same chord as Ab9#5?

Yes. Ab9#5 contains Ab, C, E, Gb and Bb, which are the same pitches as G#9#5 under different letter names. The flat spelling is simpler and has no double sharps.

Why does G# ninth sharp five contain D##?

The perfect fifth up from G# is D#, and the sharp five raises it a semitone to D##. It sounds like E, but it stays a D so that the fifth keeps its own letter.

Which scale fits G#9#5?

The G# Whole-Tone Scale (G#, A#, B#, C##, D##, F#) holds all five chord tones. The ninth A# and the minor seventh F# both belong to it.