Thanks for all of your comments, ideas, and suggestions! Great community support! I ended up programming a midi bass line and assigned it to an electric bass instrument in my DAW. There was some repetition in certain sections, so it didn't take very long and I got exactly what I wanted.

I can't expect BiaB to provide everything I need/want. It's an amazing product, though. An old band mate calls BiaB witchery. LOL. There are some amazing performances that actually sync to some vocal lines and other song parts...all by coincidence. Could be that the music and melody lines are relatively common/simple. Even so, BiaB has been one of the best investments I've made in music production software. It makes quick work of fleshing out new tunes and modernizing some of my old shabby analog recordings from 20+ years ago.

Thanks again, everyone! Cheers!

Marc Keefer
Music - https://soundcloud.com/keefmeister-1
Music Videos - https://www.youtube.com/playlist?list=PLJjtca2tXOv8fpcTUuWVsozT1HyU5k-QJ