Hi. Okay, I have a Shure BG 4.1 mic and a Tascam US-122L interface. My problem is hiss. Sibilance. Snake impressions. I hear it when record monitoring is on, and it's still there when I turn the mic off. And when the mic is off, the hissing gets louder and quieter as I adjust the gain, which my ignorance and I agreed is pretty interesting. When I yank the mic out of the interface, the hissing stops, then it slowly returns when the mic goes back in. Can anyone give me a better idea of what I'm dealing with here? Perhaps a way that I can defeat it?