A♯ 9♭5
Listen plays the chord. Play Along lights up each note in order so you can follow.
Introduction
The A♯ 9♭5 chord is a five-note chord made up of A♯, C♯♯, E, G♯, and B♯. It is built from a root, major third, diminished fifth, minor seventh, and major ninth.
Notes
Key Signature
The key of A# 9♭5 (enharmonically equivalent to Bb 9♭5) has 2 flats.
Order of flats
Flats are added in a fixed order — the reverse of the sharp order. Each new flat key adds the next flat on the list.
Mnemonic: Battle Ends And Down Goes Charles’ Father
Chords in the Key of A♯ Major
These are the diatonic triads built on each degree of the A♯ major scale:
Theory: Intervals
The A♯ 9♭5 is built by stacking intervals from the root note. The formula R-M3-d5-m7-M9 describes the scale degrees used. The intervals P1-M3-d5-m7-M9 show the distance between each note in the chord.
A♯ 9♭5 — Frequently Asked Questions
What notes are in the A# 9♭5 chord?
How is A#9♭5 used in music?
What is the scale degree formula for A#9♭5?
Practice Tips
- Start by placing your thumb on A# and spacing remaining fingers across the chord.
- Practice A#9♭5 slowly with separate hands before combining.
- Listen carefully to the tension created by the altered tones in this chord.
- Try voicing A#9♭5 in different octaves to find the most comfortable position.
- Resolve A#9♭5 to a nearby chord to hear its function in context.