Quote: Originally Posted by elasticc Ah right now i'm understanding a bit more, thanks guys. So, i'm going to get a box that has more in's, but how do i connect this new box to my Presonus fire studio project? On the back of it it has an SPDIF in/out, maybe via that? the other thing i'm baffled about is how does Logic see these new in's? thanks for the help guys, starting to get it a bit better now. If the only digital connection that is available on your interface is SPDIF, then you'll only be able to add two channels. SPDIF can only carry a stereo signal. In terms of Logic, the new inputs should just appear as additional inputs alongside your existing interface inputs. Although I don't know or use Logic myself so I don't where that would be or how you configure it.