Right now my setup is small, but I could record DJ set with microphone and some of my gadgets. Here is an explanation, so I can setup next time easier:

• DDJ-FLX4
• Bastl instruments DUDE mixer. POWERED WITH BATTERIES
• Behringer U-phopria UM2 audio interface. Mono recording
• Microphone XM8500
• Microphone preamplifier Tube ultragain MIC300
• Speakers at home

The connections are:

• Inputs of the mixer: The microphone preamp, the sampler, the dj set
• Output of the mixer to Instrument audio input of the Audio interface.
• Direct monitor of audio interface to speakers
• Audio headphones to the computer, use this to check the output level

The steps are the next:

• Connect everything.
• Gain of Audio interface instr gain 2, keep it low.
• Gain of FLX4 keep it high.
• Dude gain keep it to the middle
• Use Quicktime player to record the audio. You are gonna record in stereo and in postprocessing, take the mono input. You can configure to listen in realtime
• Setup all the devices so they have similar gain. Keep gain of audio interface low, it introduce noise
• To record in the computer use Quicktime player.