I ran into a lot of issues trying to connect my DENON DJ PRIME 4+ with SoundSwitch running on an external machine. While DENON DJ offers Engine Lighting as an on-device version of SoundSwitch, I for various reasons prefer to run SoundSwitch separately. In a setup like mine, the devices use a protocol called StageLinQ to communicate with each other. In this video, I show a working setup and explain every setting.
(Sorry for the somewhat overexposed MacBook screen. I noticed after the recording but wanted to get this out.)