Hardware Manuals
Configuration
Firmware & Drivers
Firmware: Update the firmware of the unit to the latest version from https://www.pioneerdj.com/en/support/software/ddj-sb3/#firmware-update
Drivers You don't have to install any driver software. The DDJ-SB3 is a USB Class Compliant device and your Operating System (Windows/mac OS) will install and use the standard audio driver when the device is connected to your Mac/PC with a USB cable
VirtualDJ Setup
Once VirtualDJ is launched, a Connect Window will appear. Login with your virtualdj.com account credentials.
A Pro Infinity, a Subscriber or a PLUS License is required to fully use the Pioneer DDJ-SB3. Without any of the above Licenses, the controller will operate for 10 minutes each time you restart VirtualDJ.
https://www.virtualdj.com/buy/index.html

Click on the DDJ-SB3 button if speakers are connected to the Master Output of the DDJ-SB3. You can still change that from Settings->AUDIO tab.
Click to OK.

The unit is now ready to operate with VirtualDJ.
MIDI Operation
The unit should be visible in the MAPPING tab of Config and the “factory default” available/selected from the Mappings drop-down list. The factory default Mapping offers the functions described in this Manual, however those can be adjusted to your needs via VDJ Script actions.

Find more details at
https://www.virtualdj.com/wiki/VDJ8script.html
AUDIO Setup
The unit has a pre-defined Audio setup and a special button in the AUDIO tab of Config to provide that.

Please read the manual of DDJ-SB3 for further functionality https://www.pioneerdj.com/en/support/documents/ddj-sb3/
For further software settings please refer to the User Guides of VirtualDJ.
https://www.virtualdj.com/manuals/virtualdj8/index.html