Hi, John. I downloaded your manual and skimmed through it. My impression is that you should be able to connect this to a PC (not sure about a Mac, but hopefully it would work the same) without any additional software and use it essentially (from the computer's perspective) like a set of USB speakers. So, no additional DAC required. It looks relatively plug and play to me, and the manual gives some troubleshooting tips if you don't get audio on the first try.