I have audio issues with my Z2 with my Rane 12s. It seems something is pushing the 'load' and it's causing audio issues. A clicking noise is happening all the time but seems to be more so when I'm scratching or even mildly manipulating the vinyl.
Most audio interruptions i have experienced had to do with USB Buffer. A possible solution is to increase the buffer size and/or connect the controllers on a different socket/hub than the Z2/AudioDevice.
Thanks for the help!