Also, if reinstalling doesn't work, try navigating to your FeralHeart sounds folder (should be in C:\FeralHeart\media\sounds if you're on Windows) and checking to see if the sounds are there. If they are, try playing the individual sound files in media player to see if you can hear them - if so, then either you need to check FeralHeart in the volume mixer panel and make sure the game itself isn't muted, or check C:\FeralHeart and make sure you have irrKlang.dll and ikpMP3.dll in there.
If anything's missing and you don't feel like reinstalling a third time, I can always upload the missing stuff for you if it's allowed. :3