So, you don't mention what you have tried to fix this or mention any details about your computer so I'm just going to suggest the obvious things to try:
I have repaired and reinstalled the game, My drivers are all up to date, I have tried every combination of sound settings possible. I have a logitech G430 headset that comes with its own soundcard.
I have an intel i7 3537U.
Graphics - Intergrated (yea yea I know, I still have a 1.05 kd and nearly 700 hours in the game though)
Intel graphics cards are not supported. I am not saying the game can't run because obviously in this case it can, but since it's not supported it can cause all kinds of bugs and I cannot rule out that this is one of them.
Have you tried running the automatic driver update detection tool on Intels website since you are sure you have the latest drivers?
You might also want to attach your dxdiag to this post:
http://help.ea.com/au/article/how-to-gather-dxdiag-information/
Here is my Dxdiag infomation
And my drivers are indeed up to date, what I dont understand is how the only bug that I have ever come across using and intel chip is a sound bug specific to belt fed LMG's and a single PDW.
