Screeching audio at times

Has anyone else had the issue of having screeching audio in both live views and video recordings? This doesn't happen all the time, bit in both live viewing with someone at my door and on video recordings, made from motion alerts, I will get this awful screeching as the audio that is unbearable to listen to while viewing the video or live view. Needless to say if it happens after answering a ring, I can't communicate with the person at the door! Again, this doesn't happen every time, but frequently.