Ab 7♯9
Notes:Ab – C – Eb – Gb – B
Formula:R-M3-P5-m7-A9
Intervals:P1-M3-P5-m7-A9
Scale Degrees:1-3-5-b7-#9
Introduction
The Ab 7♯9 piano chord (Ab7♯9) consists of the notes Ab, C, Eb, Gb, B. Formula: R-M3-P5-m7-A9 | Scale degrees: 1-3-5-b7-#9.
Enharmonic equivalent: A♭ is enharmonically equivalent to G♯. See G# 7♯9.
Notes
Ab 7♯9 Inversions
| Position | Notes |
|---|---|
| Root Position | Ab4 – C5 – Eb5 – Gb5 – B5 |
| 1st Inversion | C4 – Eb4 – Gb4 – B4 – Ab5 |
| 2nd Inversion | Eb4 – Gb4 – B4 – Ab5 – C6 |
Key Signature
The key of Ab 7♯9 has 4 flats: B♭, E♭, A♭, D♭.
B♭E♭A♭D♭
Theory: Intervals
Formula: R-M3-P5-m7-A9
Intervals: P1-M3-P5-m7-A9
The Ab 7♯9 is built by stacking intervals from the root note. The formula R-M3-P5-m7-A9 describes the scale degrees used. The intervals P1-M3-P5-m7-A9 show the distance between each note in the chord.
Ab 7♯9 — Frequently Asked Questions
What notes are in the Ab 7♯9 chord?
The Ab 7♯9 chord (Ab7♯9) contains 5 notes: Ab, C, Eb, Gb, B. Formula: R-M3-P5-m7-A9.
How is Ab7♯9 used in music?
Ab7♯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 Ab7♯9?
Ab7♯9 uses scale degrees 1-3-5-b7-#9, giving it its distinctive sound.
Practice Tips
- Start by placing your thumb on Ab and spacing remaining fingers across the chord.
- Practice Ab7♯9 slowly with separate hands before combining.
- Listen carefully to the tension created by the altered tones in this chord.
- Try voicing Ab7♯9 in different octaves to find the most comfortable position.
- Resolve Ab7♯9 to a nearby chord to hear its function in context.