Bbsus4 Guitar Chord
Bb Sus4 · also written A#sus4 · Bb–Eb–F
Bbsus4 is the Bb sus4 chord: Bb–Eb–F. Its sound is tense and suspended — the 4th leans hard on the 3rd it displaced, begging to resolve. It's also written as A#sus4 — same notes, same shapes, different spelling.
Suspended chords are about motion: Bbsus4 usually resolves to plain Bb or Bbm, and strumming between them is a songwriting trick you've heard in everything from The Who to Tom Petty. Because there's no 3rd, Bbsus4 works over both major and minor contexts in the key of Bb.
The most common way to play Bbsus4 is the barre shape at the 1st fret (x 1 3 3 4 1, low E string to high E string). Below you'll find 8 ways to play it across the neck, from open position to barre and shell voicings, with the theory behind the chord and the progressions it lives in.
How to Play Bbsus4: 8 Voicings
Frets are listed from the low E string to the high E string. x = don't play that string, 0 = open string.
Bbsus4 Chord Theory
| Interval | R | 4 | 5 |
|---|---|---|---|
| Note | Bb | Eb | F |
Bbsus4 is built from the Bb major scale.
Bbsus4 Chord FAQ
What notes are in the Bbsus4 chord?
Bbsus4 contains 3 notes: Bb (R), Eb (4), F (5). The interval formula for a sus4 chord is R–4–5.
What is the easiest way to play Bbsus4 on guitar?
Use the barre shape at the 1st fret: x 1 3 3 4 1 (frets listed from the low E string to the high E string, x = don't play that string). Bbsus4 has no open-position shape in standard tuning, so this movable form is the standard starting point.
Is Bbsus4 a major or minor chord?
Neither — Bbsus4 has no 3rd, the note that decides major versus minor. That ambiguity is exactly why it's useful: it fits over both major and minor harmony.
Is Bbsus4 the same as A#sus4?
Yes. Bb and A# are enharmonic equivalents — the same pitch written two ways. Bbsus4 and A#sus4 use identical shapes and frets; which spelling you see depends on the key of the song.
What keys use the Bbsus4 chord?
Bbsus4 appears diatonically in Bb major (as I), F major (as IV), and Eb major (as V) — plus G minor, its relative minor key.
Related Chords
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