Yeah so now whatever setup you're running it on needs VLC, which is not a given and also has its own downsides, and you have to mess with the audio for it to still maybe sound bad if they screwed it up irreparably.
so it might need to be redownloaded. I can only say in my limited experience i've only had this happen one, maybe two times, a really long time ago. and usually with cam, which is why some people are patient and wait for TS or TC rips of movies still in theaters. I've never had TV audio messed up. More common is bad subtitles!