I DJ 3 or 4 times a week @ 5 star hotels in their lounges/bars. I recently sold my Traktor & completely switched over to rekordbox & got the DDJ-RR.

Since I got the DDJ-RR, it has suddenly crashed twice during my sets @ the hotels. I use the DDJ RR with a 2015, 13 inch mac. An RCA cable is going into the hotel system from the DDJ-RR. The DDJ-RR has crashed once plugged into the wall, & once just powered by my mac.

This is what happens;

Music is playing fine. Suddenly, like out of nowhere, the DDJ-RR goes completely dark & some constant horrible high-pitched noise blares out from the speakers, even when I turn down the faders on the DDJ-RR or turn the DDJ-RR off. The only way to stop the horrible noise is to turn off the hotel amp, unplug the USB cable from the mac to the DDJ-RR, & turn the DDJ-RR on again.

It's an absolute nightmare & I don't know what to do. If this happens a third time, I think I will get fired.

What is it? What could be the problem here?