ok - this is probably really basic 4 most of u BUT- I'm wondering what the blue jack is for on the back of my soundcard-- the pink one is for my mic, the green is for my speakers, and the blue one is for ??? I believe I have an Avance AC97 -? at least that what it says when I go to control panel/sounds & audio devices -- thanx peepole-:grinthumb -sorry so dumb