I don't know about your wireless mic problems but as far as your wired mics I had a similar problem with hum. I talked to a sound guy and found out that condensor mics are really prone to picking up hum (most cheap mics are condensor). He suggested using dynamic mics. That's something to look into. -Dave >I'm shooting video indoors in a classroom, using an Sony trv950 camcorder. >I've had lots of problems with microphone noise. Hums and buzzes have >plagued all my wired microphones. The wireless mic, Sony WCS 999, has >given good, clear sound 90% of the time, with aggravating intermittent >"sssnickk" sounds.