A♯ 7sus4
Also known as B♭ 7sus4
Same keys, different spelling.
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A♯7sus4
A♯ – D♯ – E♯ – G♯
Formula:R-P4-P5-m7
Intervals:P1-P4-P5-m7
Scale Degrees:1-4-5-b7
Introduction
The A♯ 7sus4 chord is a four-note chord made up of A♯, D♯, E♯, and G♯. It is built from a root, perfect fourth, perfect fifth, and minor seventh.
Notes
A♯ 7sus4 Inversions
| Position | Notes |
|---|---|
| Root Position | A♯ – D♯ – E♯ – G♯ |
| 1st Inversion | D♯ – E♯ – G♯ – A♯ |
| 2nd Inversion | E♯ – G♯ – A♯ – D♯ |
| 3rd Inversion | G♯ – A♯ – D♯ – E♯ |
Key Signature
The key of A# 7sus4 (enharmonically equivalent to Bb 7sus4) has 2 flats.
B♭E♭
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.
B♭E♭A♭D♭G♭C♭F♭
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:
C
D
E
F
G
A
B
C
D
E
F
G
A
B
I — A♯ Major (major)
Theory: Intervals
Formula: R-P4-P5-m7
Intervals: P1-P4-P5-m7
The A♯ 7sus4 is built by stacking intervals from the root note. The formula R-P4-P5-m7 describes the scale degrees used. The intervals P1-P4-P5-m7 show the distance between each note in the chord.
A♯ 7sus4 — Frequently Asked Questions
What notes are in the A# 7sus4 chord?
The A# 7sus4 chord (A#7sus4) contains 4 notes: A#, D#, F, G#. Formula: R-P4-P5-m7.
How is A#7sus4 used in music?
A#7sus4 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 A#7sus4?
A#7sus4 uses scale degrees 1-4-5-b7, giving it its distinctive sound.
Practice Tips
- Start by placing your thumb on A# and spacing remaining fingers across the chord.
- Practice A#7sus4 slowly with separate hands before combining.
- Listen carefully to the tension created by the altered tones in this chord.
- Try voicing A#7sus4 in different octaves to find the most comfortable position.
- Resolve A#7sus4 to a nearby chord to hear its function in context.
Related Tools
Chord FinderLook up any chord — see the notes, hear it, and play along.Chord DrillTimed drills to build speed and recognition across all chord types.Practice RoomPlug in a MIDI keyboard and get real-time feedback on every chord and scale.Circle of FifthsVisualize key relationships, relative minors, and key signatures.MIDI MonitorLive MIDI message stream with note names, velocity, and a scrolling staff.