LOL, calling Terry_42 a neub … or is it noob … could prove a slight error :-).
To give you a slightly longer answer:
No!
(Sorry, couldn’t resist). Effectively you are getting only one stereo signal out of your laptop going into whatever speaker/PA system you are utilising. So, on your DMX06 (great little mixer, been my spare for years) there is just one channel being used. No crossfading or anything.
The solution for this would be to get a big soundcard with 4 stereo outputs, however, now your are stuck for channels on the DMX, because it’s strictly a two-channel mixer. well yes you can set the phono inputs to be line inputs and the line/phone flip switch to go back and forth, but not quite the setup you’d want.
So, in essence, going the controller route if you are indeed serious about this, is actually the smartest option. Another would be to get a 4-channel (midi preferably) mixer.
Hope that helps & greetinx,
Chuck