That sounds like it may be a problem on your side, I'll look into it but I've never come across any issues with music/sfx like what you're describing.
After reading more than 5 different forum posts i've figured out its some old frame rendering issue caused by god knows what(cpu utilization jumping from ~7% to 17% and back when the stutters occur). Does not seem to be that common but i was definitely not the first person to experience this. After trying a lot of things like trying different versions etc. and pulling my hair out for an hour i figured out that if you set the text speed to the max it seems to fix the problem. I guess i'll have to play like this if i want to play the game at all but the charm of them speaking is lost. If i figure out a better fix i'll let you know i guess...