Joni......Perhaps pull the tower out from under the desk and with a good light look at the sound card.......beside the coloured plugs ...there should be a icon or sketch etched into the metal beside each coloured plug.......
You should see one that looks like a mike , another that looks like a headset and so on ......If you still have the booklet that came with the sound card .....it will tell you in there . If you can give me the specific model of the sound card ......I can look it up and be certain .........
"it's the getting up and down that is the problem ! "
The minds willing , but the body objects..........lol , I can relate to that.
dl65