B♭ Suspended 2nd Chord

Chord Tones: B♭ Suspended 2nd Chord

Symbol: sus2 — Formula: 1-2-5

Chord Notation

Roman numeral (e.g. I, IV, V) and Nashville Number notation are key-dependent. See Keys pages for chord function within specific keys.

Inversions

Harmonic Function

The B♭ sus2 chord commonly functions as the subtonic (♭VII) in C major or subdominant in F major. Its harmonic role varies by key — in major keys it provides stable harmonic grounding.

The sus2 chord replaces the third with a major second, creating an open, ambiguous sound with no major or minor quality. It is widely used in rock and pop for its airy, unresolved character. The B♭ Suspended 2nd Chord specifically contains 3 notes: B♭, C, F (formula: 1-2-5). On piano, Bb-rooted chords start on a black key and create hand shapes that jazz pianists find ideal for voicing seventh chords and extended harmonies. Jazz standards, swing, and big band charts are heavily weighted toward Bb because it allows horn sections to play in their most comfortable range.

Common Progressions

The B♭ Suspended 2nd Chord frequently appears in these progression patterns (shown in Roman numeral notation relative to key):

• Vsus2-V-I

Songs Featuring the Suspended 2nd Chord

Well-known songs where the B♭ Suspended 2nd Chord — or this chord type — plays a prominent role:

• Pinball Wizard – The Who
• She Talks to Angels – Black Crowes
• Waiting for the World to Change – John Mayer

Tuning Frequencies Across Temperaments

Frequencies shown at A=440 Hz. View full temperament data for any note.

Scales Containing the B♭ Suspended 2nd Chord

These scales include the B♭ Suspended 2nd Chord as a diatonic or characteristic chord: