Cueing Sound

Hi, I updated to Rekordbox 5.4.2 this morning, and I'm now having some issues with the sound coming from the Headphones. Even with the headphones level turned all the way down, I can hear a screeching, almost flange like sound coming out of the headphones. This becomes worse as i turn the level up.

I've tested multiple sets of headphones to no avail, and can guarantee that the problem is related to the update, as I have not had such an issue before.

All other sound and functions are fine, this is the only problem.