Need help with playing with output 1 and 2 at the same time
Posted: 10 Apr 2015, 11:03Hey guys I need urgent help because my gemini Cross DJ le doesn't have a built in sound card so I bought one but cannot cue in my headphones. Pls help ASAP! 
You do need a second soundcard if you want to use your PC output for master.
In windows you use asio4all driver to combine soundcards in mac the aggregate souncard option.
Simple usb sc costs 5-10 €.
If you plan to do some more djing spending like 25 results in a 4 out sc (2x stereo).
For a little more you have 4*4 which includes inputs. This is what you would prefer to use until you might go more pro.
The manual has quite some info on how to set up. Can accessed via the help menu in Cross.