I've noticed a hissing or whining sound when running (at least) Formula Ultimate, V10 and V12 cars. I don't hear it when I run shifter karts though. I adjusted the volumes and isolated it to the engine sounds. However, when I open the .wav files in the sounds folder, everything sounds normal. Anyone have any ideas? I've already made sure my audio settings in the config tool are correct and verified my files in Steam. Thanks!