SETUP
Step 1. Connections
Connect the 4TRAK with your computer using the provided 
USB cable.  
Connect your 
speakers to the
 rear Master Output using proper RCA cables and your Headphones to the front socket.
Step 2. Drivers
Install the required 
drivers from 
https://www.numark.com/product/4trakAvailable for both Windows and Mac
Step 3. VirtualDJ
Install VirtualDJ 8 from 
http://www.virtualdj.com/download/index.html (in case you have not done already)
Start VirtualDJ and 
login with your Account credentials. 
A Pro Infinity or a Pro Subscription License is required. 
http://www.virtualdj.com/buy/index.htmlDetection Window
A detection window will appear when the unit is first connected with VirtualDJ. 
Click on the "Use Soundcard" button so that VirtualDJ will apply the pre-defined audio configuration (speakers need to be connected to the Master Output of the unit)
Click to OK
 
 A 2nd detection window will appear next verifying proper connection of the top FX unit (detected as a 2nd device) 
Click to OK
 
 The 4TRAK is now 
ready to operate with VirtualDJ