Jazz Blues in Bb

The jazz blues in Bb enriches the basic 12-bar form with ii–V substitutions and passing chords. Bb7–Eb7–Bb7–Bb7–Eb7–Edim7–Bb7–G7–Cm7–F7–Bb7–F7. The diminished passing chord and the turnaround (G7–Cm7–F7) elevate this far beyond the simple three-chord blues, requiring harmonic awareness and fast chord changes.