I have been researching these two terms, and am slightly confused! I understand that S/PDIF is more or less a consumer grade version of AES/EBU. They are both a means to transfer digital audio between two devices, correct? Assuming I've got that part right, I'm having trouble finding out what type of modifications I would need to make to a PC to use either one of these connections. I assume I would need to add a component to accept the cable coming into the PC from the preamp. What I'm looking at here, is how to get directly into the PC from an M-Audio Tampa unit, which I think has both S/PDIF and AES/EBU outputs. I'm going to go dig some more now. Thanks for any advice anyone can offer!