Hi there
I’ve had a sound problem since the game was released. The sound of the voice output breaks off at irregular intervals. The funny thing is that only the speech is really gone … The sound of fighting noises or spells is still going on. Only the voices of units are completely gone, which is really annoying for the story! as soon as I reload the game or go to the main menu, it works again. And yes my drivers are up to date …
for me its like unit’s sound working for original model but not for importing model. really sucks…
Same problem here. Most of the games sound crashes partially and then after some time crahes completely so I have to play without any sound 
i have the same problem. The unit’s sounds and the dialogues works at the beginning of the mission and suddenly it doesn’t work. It works again at the next mission.