as far as the double up with the synth bass and the bass guitar.... it gets no funkier than Holy Ghost... but you also see the interplay with the drums to give you that percussive "beat" (with actual drum playing used more than the drum machine)

http://www.youtube.com/watch?v=WSNE3NpKu9M


of course they used it later ....without really having the bass guitar sound...but blending with the drums...this time with more of an emphasis on a drum program....with the synth bass...

on She talks to me with her body
http://www.youtube.com/watch?v=iv-tUMgK7Wc