Run the main outs of the board to the ins on the 24/96. The main outs will be 1/4" I believe, so you will need RCA to 1/4" converters for that. On my 1604, I also run the outs of the 24/96 back to the board into one of the stereo channels and depress the alt-out button. That way I can listen to my headphones on the mixing board with the outs of the computer.