B♭ Suspended 4th
Also Known As
Hear the B♭ Suspended 4th chord played for you.
B♭sus4
B♭ – E♭ – F
Formula:R-P4-P5
Intervals:P1-P4-P5
Scale Degrees:1-4-5
Introduction
The B♭ Suspended 4th chord is a three-note chord made up of B♭, E♭, and F. It is built from a root, perfect fourth, and perfect fifth.
The Bb Suspended 4th piano chord (Bbsus4) consists of the notes Bb, Eb, F. It is a chord where the third is suspended and raised to the perfect fourth, giving it a tense, unresolved sound that naturally wants to resolve to the major third. Formula: R-P4-P5 | Scale degrees: 1-4-5.
Notes
B♭ Suspended 4th Inversions
| Position | Notes |
|---|---|
| Root Position | B♭ – E♭ – F |
| 1st Inversion | E♭ – F – B♭ |
| 2nd Inversion | F – B♭ – E♭ |
Key Signature
The key of Bb Suspended 4th 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 B♭ Major
These are the diatonic triads built on each degree of the B♭ major scale:
C
D
E
F
G
A
B
C
D
E
F
G
A
B
I — B♭ Major (major)
Theory: Intervals
Formula: R-P4-P5
Intervals: P1-P4-P5
The B♭ Suspended 4th is built by stacking intervals from the root note. The formula R-P4-P5 describes the scale degrees used. The intervals P1-P4-P5 show the distance between each note in the chord.
B♭ Suspended 4th — Frequently Asked Questions
What notes are in the Bb Suspended 4th chord?
The Bb Suspended 4th chord (Bbsus4) contains: Bb (root), Eb (perfect fourth), and F (perfect fifth). The perfect fourth replaces the third, creating a strong upward pull toward resolution — the 4th degree (Eb) strongly wants to resolve down to the major third.
How does Bb Suspended 4th differ from Bbsus2?
Both replace the third, but Bbsus2 uses the 2nd degree (giving an airy, neutral feel) while Bb Suspended 4th uses the 4th degree (Eb), which creates stronger tension. The sus4 chord has a more urgent, directional pull toward resolution than sus2.
What does "sus4" resolve to?
The 4th degree (Eb) in a sus4 chord typically resolves down by one semitone to the major 3rd of the chord — this is the classical "suspension resolution." The movement Eb → (major 3rd) is one of the most satisfying motions in Western harmony and drives the resolution from Bbsus4 → Bb Major.
How is Bb Suspended 4th used in music?
Sus4 chords appear in nearly every genre. They create anticipation before resolution to a major chord, work as dramatic openings (Pinball Wizard, Hard Day's Night), and add harmonic colour in pop and classical music. The Bb Suspended 4th is especially common as a pre-dominant chord that builds tension before the final chord of a phrase.
What songs use suspended 4th chords?
A Hard Day's Night (Beatles) opens with a sus4 chord. Pinball Wizard (The Who) uses sus4 throughout. Feelin' Alright (Traffic), Behind Blue Eyes (The Who), and many hymns use sus4 chords for their characteristic build-and-release quality.
Can I use Bb Suspended 4th before Bb Major?
Yes — Bbsus4 → Bb Major is one of the most satisfying resolutions in music. The fourth degree (Eb) resolves down to the major third, while the root and fifth stay constant. This V–I style resolution works in any tempo and style, from gospel to pop to classical.
Practice Tips
- Play Bbsus4 (Bb Eb F) then immediately Bb Major — feel how the fourth (Eb) resolves down to the major third. This is one of the most satisfying moves in music.
- Bb Suspended 4th creates tension; Bb Major resolves it. Practice this sus4→Major resolution until it feels natural at different tempos.
- Try the full sus4 sequence as a loop: Bb Major → Bbsus4 → Bb Major → the next chord. This pattern drives many pop and rock progressions.
- Compare sus2 and sus4 on the same root: Bbsus2 is floating and open; Bbsus4 is tense and directional. Both avoid major/minor but with different emotional weight.
- Use Bb Suspended 4th before the final chord of a phrase: it builds anticipation and makes the resolution feel more earned.
- In gospel and hymn contexts, sus4–Major resolution (the "amen" cadence feel) is fundamental — practice it slowly with full sustain pedal.
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.