Hi Bill, Like you I only have Bass, Drums....sometimes Guitar....... on backing tracks.
I'm playing & singing, live on Guitar & Banjo.
My equipment is very low tech! Large Sony MiniDisc player adapted to play from a foot pedal. I set it on "Auto Pause".........Which makes it as seamless as possible for me.......no fiddling with hand controls.....most of my gigs are on stage, so I like to "present" things if possible. Another bonus with the Sony, is the ability to "edit" & change a running order to suit. Works for me! Joe G.