I need a file host site for audio (.WAV)?

I suggest you store your files offline at this site http://eatbytes.com in order to save on bandwidth costs. Files are hosted on a 1000Mbit unmetered port. You can put links to these files on your website so your users can easily download them. They have no download limitations, hosting costs are covered by advertising revenue. No worry that you'll need to buy a "premium" account.