The B♭ 7sus4 chord is a four-note chord made up of B♭, E♭, F, and A♭. It is built from a root, perfect fourth, perfect fifth, and minor seventh.
Construction
B♭ 7sus4 = Root + Perfect 4th + Perfect 5th + Minor 7th = B♭ · E♭ · F · A♭
| Note | Interval | Degree |
|---|---|---|
| B♭ | Root | 1 |
| E♭ | Perfect 4th | 11 |
| F | Perfect 5th | 5 |
| A♭ | Minor 7th | ♭7 |
B♭ 7sus4 Inversions
| Position | Notes |
|---|---|
| Root Position | B♭ – E♭ – F – A♭ |
| 1st Inversion | E♭ – F – A♭ – B♭ |
| 2nd Inversion | F – A♭ – B♭ – E♭ |
| 3rd Inversion | A♭ – B♭ – E♭ – F |
Key Signature
A chord has no key signature of its own, but the B♭ 7sus4 is the tonic (I) chord of Bb Major, whose key signature has 2 flats (B♭, E♭).
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 B♭ Major
These are the triads built on each degree of the B♭ major scale:
B♭ 7sus4 — Frequently Asked Questions
What is the B♭ 7sus4 chord on piano?
The B♭ 7sus4 chord contains the notes B♭ – E♭ – F – A♭. On piano, play these notes together to sound the chord.
What notes are in the Bb 7sus4 chord?
The Bb 7sus4 chord (Bb7sus4) contains 4 notes: Bb, Eb, F, Ab. Formula: R-P4-P5-m7.
How is Bb7sus4 used in music?
Bb7sus4 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 Bb7sus4?
Bb7sus4 uses scale degrees 1-4-5-b7, giving it its distinctive sound.