It also assumes you know how to connect and configure CDJs or other controllers to manipulate rekordbox dj. The instructions provided herein are based around a DJM-900NXS2, but they will apply to other products as well, simply substitute your mixer or controller where applicable, and select the relevant input / output channels for your device.
This guide is a how-to for streaming using a 3rd party software such as OBS, and many of these instructions may also be applied to other software.
