I recently purchased a new microphone. Not a cheap run of the mill pc mic, (I have one of those, also) but an expensive studio condenser mic. This mic is self powered. It plugs into the rear mic jack on my computer. On playback after recording the sound is muffled and weak. I plug in my cheap Plantronics mic and it works properly. To see if it was a faulty microphone I plugged it into another computer and it works fine. My sound card is Realtek HD audio. In the Realtek mixer under "Record" there aren't any sliders for "CD Volume" "Mic Volume" "Line Volume" or "Stereo Mix". Under "Playback" there are sliders for each device that I can adjust the levels for. In the Windows mixer I'm not able to adjust any of the levels in the "Recording" volume controls. All sliders are shaded. Even though the mic volume slider is shaded, it's not muted and not turned down too low. I'm at my wit's end with this. I'ts been a week and I've not gotten any closer to figuring this out. Any help would be great. Thanks.