In-Game name: Botlike_Fragov
Date when you found the bug: 11 November 2012
Explain the Bug: The users with RealTek sound cards (like me) experience this weird sound bug - When it is raining IG , the only sound you can hear is the one of the rain , all other sounds like footsteps , voice , hits etc. cannot be heard .
Solution:To solve the problem simply go to Start (menu) > Run > in there type "dxdiag" without the quotes > DirectX diagnostic tool window will appear > Click the "Sound" tab > You will see a horizontal scroll "Hardware Sound Acceleration Level" > Put it to basic like in this picture
PIC . If you were in-game through the process restart it . It worked for me like a charm . Enjoy .
Cheers .