Thanks for the compliments and opinions!
I've always considered the term, "vamp" as: a repeated riff or couple-bar phrase repeated (usually at the beginning of a song) to set the groove.
I'd forgotten about the Behringer rig thing. Bass for this was recorded direct to the Korg D-12 recorder I have. The guitar was through a Tech 21 TRIAC preamp to the same recorder.
I'm got plenty of work left to do as a bass player, much less an enigineer

thanks again for your thoughts!
Best Wishes