Page 35 of 36 on the manual says line output L and R. There's also Tape out 1, 2, 3, 4, with matching specs. So take those 4 and run them into a 4 channel (or more) sound card. Like a Delta 44. It looks like RCA jacks (30 from the image, details on page 13, image on page 8). So you might need some RCA to TS plugs, not sure if that's their name or not, but radio shack has them. Looks like a 1/4" stereo plug (but mono, as in tip plus sleeve only, no ring), with an RCA input on the other end. I've got two pairs myself. For running the Delta 44 output to the stereo, through RCA cables. So four of those plugs and two stereo RCA cables, and a four channel interface. It's an unbalanced connection, so turn off your cell phone(s).