I'm running Windows XP Professional with Realtek HD Audio. In my Master Volume mixer when I go to "Options" and then "Properties" Realtek HD Audio Output is selected as the Mixer device and "Playback" is ticked. "Recording" is shaded. When I bring the volume adjusters up there's all the sliders and under each slider is a box marked "Mute". If I change the Mixer device to Realtek HD Audio input "Recording" is ticked and "Playback" is shaded. When I bring up the volume adjusters for recording there's the sliders, each with a box marked "Mute" underneath, except all of the sliders, except "Recording" are shaded out. "CD Volume" "Mic Volume" "Line Volume" and "Stereo Mix" are all shaded. In Realtek's Mixer those devices don't even HAVE sliders. Any ideas why I can't adjust my levels?