Problems (noise) with two sound cards with djay pro (MacBook 2017-High Sierra)

Hello! I have a problem with djay pro, macbook 2017, High Sierra. I can not use this program with two sound cards. After connecting with the second Soundcard I have a terrible noise on one Output. I wrote two emails to support, but no answer. Maybe somebody can help me. Thanks

I get no solution from Apple-Support or Algoriddim-Support. After downgrade operation system to Sierra (10.12.6) I can use Djay Pro again. It seems to be a problem created by High Sierra (not the only one).

Same problem, once I upgraded the high sierra 10.13.2 version, I get distortion after a few mins of it playing it. I am using a denondjmc7000