How do I connect my DJ controller audio interface?
To connect your DJ controller to a live sound mixer, all you need to do is connect the RCA to ¼-inch cable from your DJ controller to a dual-channel active DI box. Next, use the XLR to XLR (or TRS to TRS) cables to connect to your mixer.
Can I use Focusrite Scarlett as a mixer?
To set your Scarlett 18i20 to stand-alone mode, follow the instructions below: Connect your Scarlett to your computer and open Mix Control. In the Routing section, change the source for line outputs 3-10 as your analog inputs 1-8 respectively.