We need to learn about 5 - 6 new songs a week and I'm stressing. I have years of experience in music but I play mostly by ear and a bass tab here and there. Is anyone aware of a rig where I can hook my bass up to my Ipod and hear both, at the same time through my earphones. What about a devise that slows down, or even, singles out the bass line. Anyway, you get the picture. Would like a small rig that helps me rehearse during the week. Thanks, so much for trying to help.