I have windows xp and I believe I have SB X-FiAudio [9C00]. When I`m in the tower or just sitting in a plane/vehicle my mic soundes perfectly fine but soon as I start my engine it sounds like static and sorta goes thump thump thump.I have been messing with the sounds in AHand once I get it to work without all the static then people tell me I`m to low. As a side note I have 2 mics 1 with USB 1 with standard 1 prong plug,which should I use??