User submitted bug:
Played the first prison story so far and there's noticeable short crackling at the end or between sound effects, especially ones using lower frequencies, as if some wrong data bits get played out as noise - don't know how to describe it in better detail, sorry (English isn't my mother language). You'll notice it when you hear it, I'm sure.
Steps:
Umm... just playing through the first story mission until it pops up every now and then and more frequently closer to the end.