I've been googling around for some time already but I've never found any solution for this problem: Any time I play Haegemonia on Vista (and apparently it happens on Seven as well) after 30-ish minutes the game crashes with "Sound System Error" message. That's it. It appears to be a common problem but so far I was unable to find any solution...so I beg for help here, heh.
Yeah, people have asked, nobody got any solution though. Even GoG who are supposed to give the games today-ready don't have a solution for this, as far as I know. But eh, you never know when you run into someone who actually have figured that out ^.^ I guess I'll give it a try as well, thanks.