For years I have been without an A/D Converter in my home studio setup. I went into a local store the other day to ask the guy about some things. He mentioned an A/D converter and I was like huh....what's that? He explained to me and I was wondering did I really need it. Setup: M-Audio Profire 610 Focusrite ISA One Compressor & Mic.... So do I need it in my setup? What does it actually do in the chain? Is the outcome of the product 10x better than if I didn't have it? Appreciate it guys!