DDJ 800 Crashing

I downloaded the newest firmware, drivers and newest version of Rekordbox. Using a brand new 2020 Mac book pro M1 chip, 16gb with space avail on the drive. Tried upping the buffer size. It initially works, then after a bit the audio files start degrading and sounding distorted. Eventually, they stop playing altogether and the headphone cue doesn't give me any sound, basically a crash. It happens faster if the microphone is plugged into the DDJ 800. What can I do to fix this?