I have a SoundBlaster Live 5.1 using the latest Windows XP driver pack. I did a fresh install of windows last week and there's not much on my comp right now except the OS. Anyway, no matter what microphone i plug into my computer, the only way sound is picked up from it is if i go into volume control (playback) and uncheck the mute box under microphone. This of course causes a hum in my speakers. In the volume control for recording, i have the microphone selected and the volume is all the way up. Why can't i leave the playback muted and still record from the microphone? Isn't that the way it's supposed to work?