OK i know there would be a topic out there that answers this question but i cant find it so if u know where it is then can u please link it up. anyway onto the question basically decided i wanted to use my laptop as the audio source for djing, currently have a djm 400 and hp dv6 laptop (please dont flame about the laptop, just know that it has 2 headphone inputs and 1 mic imput, as well as the usual usb's) now what do i need to do so that i can simply use the mixer to operate the mixer controls on traktor. is it just that i need an external soundcard (ie uca202) (i do have some thing from xitel, but no idea what it is, i think its for exporting music) i have the rca to 3.5mm jack cord and thought all u had to do was put it into 1 line input in mixer and put into a headphone jack. obiously not. have one realy long rca to rca cable as well. anyway thats about it. long story short. want to use mixer to operate traktor. or if u just want to answer instead of linking something, thats cool too thanks