I just bought a Samson CO3U USB mic, and although the sound quality is great, there is ALOT of background noise. I'm in a completely quiet room, but there always seem to be this slight buzz sound going on. If I go to mic options and click on "listen to device", I will have nothing going on in the room, and I still hear this very prominent background noise. When I go to a recording program like cool edit pro, as soon as I press record, I see something's registering the entire time when the room is quiet. Is this a problem with the mic itself? I'm asking because I've heard many recordings done using this mic and reviews on youtube with the sound is completely clear. How can I get rid of this? Thanks.