@jkleban... Cool stuff. I'll keep all that in mind as I start getting into more MIDI based tunes (I'm going to start creating full MIDI orchestrations to really force myself to learn MIDI and synth concepts properly). For this song though I'm not actually trying to get the synth to sound like a real bass because I already have a solid bass track. This Zeta track is a) to round out the bottom end because my bass input wasn't ideal (it went through a guitar amp without any padding/EQ on my mixer which I think would have helped) and b) to maybe yank out certain parts to applying really freaky patches for some extra effect (on those I will probably alter the pitch of some of the notes too so it creates bizarro harmonies and accents with the live bass). The slides can sound like a synth slide and in fact that's pretty much what I want. Kind of like a Moog style brain buzzing low end feel to compliment the live bass.
 
However you did remind me that I was going to try the Picked Alembic Zeta patch to see how well that rounds out the live bass tone but even then it would be necessary for the slides to sound exactly like the real thing because it would be lowere in the mix just adding some low end weight.
 
Thanks for all the insights though. Certainly giving me some ideas to try out.
 
Cheers.