charlyg
Yeah I thought I might have put it in the wrong forum.. I'll give the Tremolo a try. At least I understand the adjustments.
I like the use of "quiver"!

Another idea for the bass might be vibrato/leslie simulator: think of the way the bass sounds in the song "Heartbreaker" by led Zep.

That seemed to work... I used Amplitube 4 Classic SVT, 8x10e, and the Opto-tremolo..... I may try to add a little gain/fuzz but it's close with just the trem......I tried an Octave pedal but not what I'm "hearing"...
 
 
PS I'll give the vibe a try as well, but I am in the ballpark now!

Cool. Good luck with your song.