If your computer has a Soundblaster type card, you can buy a cable with a single 1/8" stereo jack on one end, and two RCA jacks on the other end. Radio Shack. Plug the single 1/8" jack into the line out on your card/computer, and the two single RCA's into the Tascam in's. This is providing you want a stereo copy. Would work for mono as well. Anyway, it sounds like you are just in need of that type of cable.