Kontrol S2 with vinyls/cdjs?

I know the Kontrol S2 doesn't come with inputs for turntables or cdjs (like the S4), but is there a work around to make the S2 be used with turntables/cdjs along with Traktor? The reason I ask is because I saw somebody on youtube using turntables with a numark total control and Virtual DJ (i think), and another had an xponent with turntables and (torq).

you're gonna need to buy a soundcard like the traktor audio 6 or audio 10 to use youre tables/cdjs with the s2

For TT you need an external soundcard, for CDJs if they have a USB port, just plug it in the laptop.