Commentaire officiel
Two ways... and I'm assuming you're on a Mac?
1) Your easiest option is to disable the mic from the booth output, then send the audio output from the booth out to the line in on your computer, record in software.
2) The complicated option is to send all four channels of audio post-fader to be recorded in the software, then after the set is recorded, do a mix-down of all four audio feeds into one flat file.