All sounds are very high pitch and broken.

So my Minecrafts sound is broken. Everything is in a wierd pitch. I have absolutly no idea how to describe it. I have tried reinstaling the game but its still there. I just made a small yt video about it here is the link: https://youtu.be/r2y46Bd6D2I

 

So yeah I dunno whats going on... do I get a notification when you guys respond? I wonder...