F# Dominant 9th
Notes:F# – A# – C# – E – G#
Formula:R-M3-P5-m7-M9
Intervals:P1-M3-P5-m7-M9
Scale Degrees:1-3-5-b7-9
Introduction
The F# Dominant 9th piano chord (F#9) consists of the notes F#, A#, C#, E, G#. Formula: R-M3-P5-m7-M9 | Scale degrees: 1-3-5-b7-9.
Enharmonic equivalent: F♯ is enharmonically equivalent to G♭. See Gb Dominant 9th.
Notes
F# Dominant 9th Inversions
| Position | Notes |
|---|---|
| Root Position | F#4 – A#4 – C#5 – E5 – G#5 |
| 1st Inversion | A#4 – C#5 – E5 – G#5 – F#6 |
| 2nd Inversion | C#4 – E4 – G#4 – F#5 – A#5 |
Key Signature
The key of F# Dominant 9th has 6 sharps: F♯, C♯, G♯, D♯, A♯, E♯.
F♯C♯G♯D♯A♯E♯
Theory: Intervals
Formula: R-M3-P5-m7-M9
Intervals: P1-M3-P5-m7-M9
The F# Dominant 9th is built by stacking intervals from the root note. The formula R-M3-P5-m7-M9 describes the scale degrees used. The intervals P1-M3-P5-m7-M9 show the distance between each note in the chord.
F# Dominant 9th — Frequently Asked Questions
What notes are in the F# Dominant 9th chord?
The F# Dominant 9th chord (F#9) contains 5 notes: F#, A#, C#, E, G#. Formula: R-M3-P5-m7-M9.
How is F#9 used in music?
F#9 is used in jazz, fusion, and contemporary music to add harmonic color. It appears as a dominant or tonic chord depending on context.
What is the scale degree formula for F#9?
F#9 uses scale degrees 1-3-5-b7-9, giving it its distinctive sound.
Practice Tips
- Start by placing your thumb on F# and spacing remaining fingers across the chord.
- Practice F#9 slowly with separate hands before combining.
- Listen carefully to the tension created by the altered tones in this chord.
- Try voicing F#9 in different octaves to find the most comfortable position.
- Resolve F#9 to a nearby chord to hear its function in context.