[dba-Tech] Sound card plays radio

On one of my boxes, when I turn the speakers on, I immediately hear radio. I
frequently play a radio in the same room, but the station on the computer is
not the same one. I have no idea why this occurs, and thus no idea how to
prevent it. As soon as I put the sound to some use, such as playing a CD or
tracks stored on the box, the radio sound disappears. I can record CDs and
DVDs without a problem.

Does anyone have suggestions?

TIA,
Arthur