Rename it .txt and open in notepad or wordpad. Its gonna be ugly as hell though and likely whatever you were hoping to see won't be there.
Convert it to wav then open it in notepad and look how much prettier it is.
Edit: I've actually had to convert to text for something recently at work. If you get Goldwave it has an option to save it as text and it actually does it correctly, rather than what you see in notepad by opening the wav directly.
I know this doesn't answer the original question but it may help someone who finds this through the search feature in the future.