Did Andreas or any of his team ever get this issue resolved? I hate seeing this happen. Just leaves you shaking your head. I had a similar problem with a baseball sim back in '95. Then I had a brand new PC, but every time I played that game, round about the 3rd or 4th inning the announcer's voice would disappear and be replaced by a loud hissing and crackling. Only a couple other gamers had the same problem. The programmers tried everything to get that noise out of there, but no dice. I've got my fingers crossed that your problem will resolve itself.
Cap