Whenever my frame rate drops significantly below 125 (e.g. on Corrosion, in the fan atrium area), I've noticed the sound gets glitchy. Sound effects play in repetitive short bursts like stuttering. I also tried capping the frame rate to 60 so that there'd be no wide fluctuation in fps, but the sound problem still occurs.

Does anyone know why this happens? Is it a flaw of the game engine? I don't notice this problem in other games.