HI I'm having a problem.. will try to explain as best as i can... I am getting an unusual "tick" or "click" type sound when I record bass drum or bass guitar. The sound also appears through the overheads when the drummer clicks his sticks. it doesn't appear anywhere else... It doesn't appear when recording cymbals, toms or snare. Neither does it appear on guitar tracks. If I cut at around 50 hz I lose the sound... Fine on overheads but not on Bass. Could it be some kind of electrical problem?