Wave Arts MR HumCombining hum removal, buzz removal, brickwall filtering, and spectrum analysis into one easy to use plug in, MR Hum is the perfect tool to clean up recordings with any sort of hum or nasty buzz. The hum removal section works by applying a set of notch filters spaced at multiples of the fundamental hum frequency, usually 60 Hz or 50 Hz. You select the fundamental frequency, the number of harmonics you want to eliminate (up to 10), and the width of the