Extremely loud buzz that only appears when I open up games


New Member
Was recently streaming when viewers mentioned a loud buzzing sound that was happening. We clipped it and I have been at work trying to figure out what it could be. Only when I open up games does this audio issue really appear. I have no real idea why it happens.

I have a double computer setup. Main Computer sends audio to MG10XU mixer which then goes into my Second Computer. I've tried getting audio from Main Computer with the USB connection as well as a 3.5mm to RCA connection. Both ways still produces this audio issue.

I'm going to try to uninstall and re-install OBS and see if that might help?

clip for reference.