How can i set up a live dj set with this equipment?

I currently use a behringer ddm4000 mixer which is mapped out to all four decks of traktor





Is there anyway i can play a live set with just my laptop and the mixer and all the cables





Basically i want to know if it necessary to get a soundcardHow can i set up a live dj set with this equipment?
You don't need a soundcard if you have the mixer and it is producing sound (you can check that with headphones). All you need is to connect the left/right audio outputs of the Behringer mixer to the sound system - very easy. If you do not have a sound system (amps %26amp; speakers) you will need to get one.