We have connected our sound to computer via USB on Allen Heath Zed 24. Neither Aux 1-2 or Aux 3-4 are activated so should be receiving everything to computer via USB. Only LR under USB connection is activated. We've told OBS Audio input is USB, and tried Audio output both as USB or Speakers. Either way, our livestream audio is so low it is almost none existent. All sliders on OBS mixer are maxed.