From the recording Backing and Jam Tracks for Bass Guitar Vol. 9
Kicking horns and a shuffle beat on the drums need a solid walking bass line to round out the big band sound. Keep that quarter note groove in the pocket and drive the band with this high energy backing track. Bb is an important key to work on as well. Horn players love that key, so don't get caught not knowing where a Bb is. 129 BPM.
||: Bb7 | | | | Eb9 | | Bb7 | | F9 | Eb9 | Bb7 | F9 :||