I listen via headphones mit an extension 3.5 m jack cable.

The male end into the computer is faulty. If normally inserted the problem occurs. Had to pull it out a mm or 2.

I worked it out when I watched an old nfl game. I could hear the crowd and wind but not the ref or commentators. Also on my 'All Over Now' vid, I could only hear the chorus and not the verse. Very weird.