I have a PV20 USB sound board with Berhinger power mains and run a laptop for music. I run a VocoPro UHF-8800 wireless mic setup and have the high pitch sound that isn't constant, it just shows up periodically while singing. It even happens when there's no singing. I can't figure it out. Unless I turn the volume wayyyyy down, then pull the main, the sends, and connected them to the monitor sends, it's still there.
Is there anything I can do to make this stop happening? It's a sound system for our church, and it's driving me crazy. Thanks in advance