B♭ Minor Seventh Chord

Chord Tones: B♭ Minor Seventh Chord

Symbol: m7, min7, -7 — Formula: 1-♭3-5-♭7

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♭ minor seventh 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 subdominant or supertonic color.

The minor seventh chord adds a minor seventh to the minor triad, creating a smooth, mellow sound. It is ubiquitous in jazz, R&B, and funk as both a chord of repose and a stepping stone in progressions. The B♭ Minor Seventh Chord specifically contains 4 notes: B♭, D♭, F, A♭ (formula: 1-♭3-5-♭7). 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♭ Minor Seventh Chord frequently appears in these progression patterns (shown in Roman numeral notation relative to key):

• ii-V-I
• i-iv-v

Songs Featuring the Minor Seventh Chord

Well-known songs where the B♭ Minor Seventh Chord — or this chord type — plays a prominent role:

• So What – Miles Davis
• Autumn Leaves – jazz standard
• Is This Love – Bob Marley

Tuning Frequencies Across Temperaments

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

Scales Containing the B♭ Minor Seventh Chord

These scales include the B♭ Minor Seventh Chord as a diatonic or characteristic chord: