If you've already got all that stuff you should have more than you need for backround pads. I don't exactly know what our looking for and not telling you to buy one but my Roland BK9 has a whole section on that. I would never bother creating my own as there seems to be something for everry one there and I'm really lazy LOL! I use a few but when I want a backround pad I usually go for voices, my favorite is the famous Scat Voice so I can comp with my LH and get different effects. Good luck..