This play along jamtrack has a drum and bass intro of two measures. Start playing the funk rhythm guitar exercise after the guitar scratches and you will be able to play the entire piece as demonstrated in the video. The notation at the top of the page is taken from the Jam Tracks PDF and shows the bass guitar part. It follows the changes | A7 | D7/9 | by playing the root, seventh and ninth of its chords. So much fun!