Finger Positions

Root Note G#

Name G# dominant sharp ninth over C#

Intervals 1P-3M-5P-7m-9A

Relative Minor Fm

Notes C#, G#, C, D#, F#, B

Aliases G#7#9

How to play the G#7#9/C# Chord

The G#7#9/C# is a fundamental dominant chord in guitar music. To play this chord correctly, ensure your fingers are placed precisely on the frets indicated in the diagram above.

Music Theory Analysis

From a theoretical perspective, the G# dominant sharp ninth over C# is built using the 1P, 3M, 5P, 7m, 9A intervals. In the key of G# Major, this chord functions as the I chord.

Common Progressions

In music composition, the G#7#9/C# chord is often used to create tension or resolution.

I-V-vi-IV

G# → D# → Fm → C#

vi-IV-I-V

Fm → C# → G# → D#

The Diatonic Family

Understanding the "family" of chords that belong to G# helps with transposition and ear training.

Triads

G# A#m Cm C# D# Fm Gdim

7ths

G#maj7 A#m7 Cm7 C#maj7 D#7 Fm7 Gm7b5

Scale Compatibility

View All Scales

Hungarian Major Flamenco Spanish Heptatonic Bebop Minor Half-Whole Diminished Kafi Raga Composite Blues Messiaen's Mode #3 Chromatic

* 9 scales found containing the notes C#, G#, C, D#, F#, B.

Acoustic & Digital Analysis

Digital footprint of the G#7#9/C# chord for MIDI programming and synthesizer sound design.

MIDI Numbers 61, 68, 60, 63, 66, 71

Frequencies (Hz)

277.1826309768721, 415.3046975799451, 261.6255653005986, 311.1269837220809, 369.9944227116344, 493.8833012561241