pro dj link and external audio interface

by external audio interface I mean something like a traktor A6. my idea is a proper time code vinyl/cd external audio interface that connects to your computer with pro dj link. the external audio interface would connect to any mixer with RCA. that would mean it works with record box and pioneer could add a cheaper solution to time code vinyl/cd than expensive mixers. I think kuvo would work with it to because all the mp3's are on the computer.