Hello Kim, for starters make sure that Windows is set to record from "line-in" or "analog mix". Double click on the 'speaker (volume)' icon in the lower right corner of your monitor. Go to Options --> Properties --> Select Recording --> Click OK --> Select either Analog Mix or Line In --> Make sure the volume control is turned up.
In the Acid Music Studio, make sure that your soundcard and the proper audio source is selected for recording. This is probably under Options or Preferences in the Menu.
Hope this solves the problem, no guarantees though.
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