No Ingame sound Effects

Hello, 

It seems while the game is loading in multiplayer, the in game sound effects (objective confirmations, blaster sounds, ect) will stop working.  The music within the game still works and any HUD click sounds still work and the sound works fine in single player as well.  It is only during multiplayer play in which all sound is lost.  I have already checked for updated drivers on my sound card along with turning on Stereo Mix in my recording devices.  Is there anything else that i can do to get the sound to work in game properly?