I just bought a DDJ-RB to use it with Mixxx on an Arch Linux PC. I knew there wasn’t a mapping, but I figured I could adapt the SB2 one, which actually worked quite well. But there is another problem: While the USB HID was recognized, the sound interface wasn’t. So I’m stuck with a MIDI controller without sound. There is a driver for Windows and Mac on their page, so I guess I’m out of luck here, but I still hope I’m missing something. Any idea?