The Bb7 chord
Start with the recipe. The notes are Bb - D - F - Ab, a dominant seventh, otherwise known as the Bb7. The chord feels tense in the most useful way, which is why writers chasing a strong cadence into the next chord keep landing on it. You will find it inside the twelve-bar blues and gospel turnarounds. The rest of this page lays out the common voicings, the interval theory, the progressions where the chord fits, and the records that lean on it for structural work.
Hear the Bb7 in the chord builder →Voicings for Bb7
Common ways to grip the Bb7 on guitar and piano. Guitar diagrams read low E to high E left-to-right; an × means muted, an open circle above the nut means an open string. Filled dots are fretted notes.
Guitar , full chord shapes
CAGED-derived voicings for Bb7 across the neck. Pick the shape closest to where your hand already sits.
Guitar , triad shapes
Three-note triad shapes on each string set, shown moving up the neck. Light textures for arpeggios, pop layering and chord-melody work.
Piano voicings
Root position and inversions. The bass note matters: each inversion changes how the chord sits under a melody.
The theory behind Bb7
Progressions that use Bb7
Short progressions that put the Bb7 to work. Each one is shown in a different key so you can pick the one that suits your singer.
This chord appears as a borrowed or passing chord in many major-key progressions.
→ Build this in the chord builderSongs that feature Bb7
Real records where this chord does structural work. No lyrics quoted, just the title and artist so you can pull up a copy and hear it in context.
Related chords
Chords a step away from the Bb7 in the songwriting circle, the natural neighbours when you want a substitution.
Keys where Bb7 lives
The keys where this chord turns up diatonically. Open any key page for the full set of progressions that lean on it.
Related references
Other ways to put the Bb7 to work across the reference library.
More songwriting tools
Got the chord but still wrestling with the lyric? Find the right rhyme in RhymeForge, or break a writer's block with the unexpected word-pair generator in CollisionLab. Need to map a full progression? The chord builder on the home page is where the Bb7 fits into context. All free, no signup.
About the chord builder
The Undercover Zest chord progression builder is a free interactive tool that maps every diatonic and borrowed chord in every key. Click a Roman numeral to hear it, drag chords into a progression, then audition voicings, inversions and tensions until the song clicks.
This page is a static reference for the Bb7. For interactive playback, voice-leading hints and substitution suggestions, open the chord builder above.