Hi Jay,The audio sounds good when they are broadcasting, so I'm guessing your levels are good.
I use the free VU meter to check levels to make sure I'm under 0db.
Audio Level Meter
I'm getting a strange background noise that sounds like a snare drummer going through some strange cadence. It's seems to have subsided now that I've started typing this message. However my VU meter is showing lots of activity during the silent periods. I'll try a different player and see what I get, I'm currently listening via Windows Media Player.
Update: I listened with WinAmp and the silence periods are much better.
Well, now that I've typed that, the "little drummer boy" is back again... However he appears to be more intermittent than the first time I listened.