You mean a jam clip with each one of us doing a bass solo?
I basically was rocking the chords on the 1 and 4 chords so the bass players could play without the keyboard interfering to much. I walked up from 1 to the 4 like this in the bass
Bb,C,Db,D,Eb
The chords Im mixing are pretty much the Bb7, Bbm, Eb7, and Cmin chords. I also use notes from the Bb major scale and the Bb dorian mode.