Kevin wrote:4.....years.....ago....
Kevin wrote::spam:

And 10 ... years after, got the same problem. No spam
I played few weeks ago and didnt have the problem.
Verified files from Steam, reinstalled the DVD version, all sounds except commentary audio.
I reinstalled the realtek audio drivers of my motherboard and it solves the problem. It seems that an recent automatic update had replaced those drivers.
Not sure it will help someone before the next 10 years...