Piano · seventh flat nine
F♯7♭9 Chord on Piano
F# Dominant 7♭9 is F#, A#, C#, E, G — the 1-3-5-b7-b9 pattern of a seventh flat nine chord. There are 4 ways to play it on piano, ranked below from easiest to hardest.
Every voicing below is the same 5 notes in a different order. Root position is the one to learn first; the inversions exist to keep your hand still when you change chords.
Start here — Root Position (RH)
Root position — the root is the lowest note. This is the sound in your head when you read the chord symbol, and the one to learn first.
Ways to voice it — 4 voicings, easiest first
Same 5 notes in all of them. What changes is which one sits at the bottom — and how far your hand has to travel to get there.
Way 1 of 4
Root Position (RH)
Easiest here· intermediate· the standard shape
Root position — the root is the lowest note. This is the sound in your head when you read the chord symbol, and the one to learn first.
Keys: F#4 · A#4 · C#5 · E5 · G5
Way 2 of 4
1st Inversion (RH)
intermediate
First inversion — the 3rd (A#) moves to the bottom. Reach for it when the chord before this one sat a step below: your hand barely travels.
Keys: A#4 · C#5 · E5 · F#5 · G5
Way 3 of 4
2nd Inversion (RH)
intermediate
Second inversion — the 5th (C#) is in the bass. It leans forward instead of settling, which makes it a good passing chord.
Keys: C#4 · E4 · F#4 · G4 · A#4
Way 4 of 4
Spread Voicing (Both)
advanced
Root position — the root is the lowest note. This is the sound in your head when you read the chord symbol, and the one to learn first.
Keys: F#3 · A#4 · C#5 · E5 · G5
What beginners get wrong
Moving in and out of it
The shape above: Root Position (RH).
Listening: each shape above has its own play button, and each one plays the notes that shape actually produces — not a generic triad.
F#7b9 on other instruments
Same notes, different hands. Every link below is a real page with diagrams and audio.
Chords next door
Same root, different colour — and all of them playable on piano.
F#7b9 on Piano — questions people ask
What is the easiest way to play F#7b9 on piano?
“Root Position (RH)” — which we rate intermediate — is the easiest F#7b9 shape on piano. Root position — the root is the lowest note. This is the sound in your head when you read the chord symbol, and the one to learn first.
What notes are in the F# Dominant 7♭9 chord?
F# Dominant 7♭9 is F#, A#, C#, E, G — the 1-3-5-b7-b9 interval pattern of a seventh flat nine chord. Every voicing on this page uses those notes and nothing else; they just appear in a different order and octave.
How many ways can you play F#7b9 on piano?
This page has 4 F#7b9 voicings for piano, ranked from easiest to hardest: Root Position (RH), 1st Inversion (RH), 2nd Inversion (RH), Spread Voicing (Both). They all sound like F#7b9; the differences are how hard they are to hold and how high they sit.
What can I play instead of F#7b9?
The nearest stand-ins on piano that keep the same root are F#sus4, F#sus2, F#. They keep the root and the fifth and only change what sits in the middle, so most songs still work — but check the swap against the melody, because the note you removed may be the one the tune is singing.
Can I play F#7b9 on other instruments?
Yes. F#7b9 is the same set of notes everywhere; only the fingering changes. This site has diagrams and audio for it on guitar.
Learn the theory behind F#7b9
The shape gets your fingers there. These explain why it sounds the way it does.