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F7♯9 Chord: Guitar, Piano and Notes

The F7♯9 chord is a altered dominant seventh chord built on the root note F. Its notes are F, A, C, E♭ and G♯.

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Quality
Short answer

Dominant seventh sharp nine chords sound gritty and bluesy at once, the clash of a major third against a sharp ninth that reads to the ear like a minor third. Funk, rock and soul horn sections lean hard on this one chord.

Notes
F · A · C · E♭ · G♯
Formula
1 · 3 · 5 · ♭7 · ♯9
Semitones
0 · 4 · 7 · 10 · 15
Note
F
Quality
Dominant 7♯9
Symbol
F7♯9

F7♯9 on piano

5 notes
View:
Piano diagram of the F7♯9 chord

Switch to the interactive diagram to hear the chord, change voicing and swap finger numbers for note names.

To play F7♯9 on piano, place your right hand with your thumb on F, index finger on A, middle finger on C, ring finger on E♭ and little finger on G♯. Press the keys together and listen for an even sound. On the keyboard E♭ and G♯ are black keys and F, A and C are white. Practice moving in and out of the chord slowly, then bring in a metronome.

  • F1
  • A3
  • C5
  • E♭♭7
  • G♯♯9

F7♯9 on guitar

View:
Guitar chord diagram of the F7♯9 chord

Switch to the interactive diagram to hear the chord, change voicing and swap finger numbers for note names.

On guitar, F7♯9 is commonly played with the voicing shown above. String 5 rings open.

F · A · C · E♭ · G♯

Try F7♯9 on the virtual piano

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F7♯9 chord notes

DegreeIntervalSemitonesNoteHear
1Root0F
3Major third4A
5Perfect fifth7C
♭7Minor seventh10E♭(Eb)
♯9Augmented ninth15G♯(G#)

How to use the F7♯9 chord

The F7♯9 chord is built from a root, a major third, a perfect fifth, a minor seventh and an augmented ninth. Start at the root F and stack the intervals to get the whole chord: F, A, C, E♭ and G♯. The same formula gives you the chord in any other key.

Dominant seventh sharp nine chords drive funk, blues-rock and fusion as the tonic of a dominant-based vamp, not only as a V chord. Whole grooves in soul and rock guitar are built around this one chord.

How F7♯9 differs from similar chords

F7♯9 holds both a major third and a raised ninth that sounds like a minor third, so it is major and minor at once. That clash separates it from F7♭9, where the ninth is lowered, and from F9, where it is natural. Guitarists often call it the Hendrix chord.

Where F7♯9 is used

A dominant chord wants to resolve. Its home is the V of a major key - and the I of a blues, where the pull never lets up.

As the VB♭ major
  1. ii7Cm7
  2. V7♯9F7♯9
  3. Imaj7B♭maj7

F7♯9 is the chord that wants to resolve, so ending the loop on it hands straight back to the top.

Questions people ask

What notes are in the F7♯9 chord?
The F7♯9 chord contains F, A, C, E♭ and G♯ (F, A, C, Eb and G# in plain text).
Is the F7♯9 chord major or minor?
F7♯9 is a altered dominant seventh chord. Dominant seventh sharp nine chords sound gritty and bluesy at once, the clash of a major third against a sharp ninth that reads to the ear like a minor third. Funk, rock and soul horn sections lean hard on this one chord.
How do you play F7♯9 on piano?
Place your fingers on F, A, C, E♭ and G♯ and play them together. The root usually goes to the little finger of the left hand, the upper notes to the right. On the keyboard E♭ and G♯ are black keys and F, A and C are white.
How do you play F7♯9 on guitar?
Use the fingering in the diagram above. String 5 rings open.
What chords work well with F7♯9?
F7♯9 pairs naturally with the chords in the related section: a perfect fifth up or down, the relative major or minor, and anything sharing two notes with it.