First, you own the copyrights, correct? If so, then posting a sound file is just like any other file. You use FTP or whatever file upload utility you have to copy the file to your web site and then you put an anchor tag in the HTML of a page to reference the file. If you do not own the...
It is called the lost art of READING. There is NO one place. Learn how to use a search engine... and then READ. That is probably NOT the answer you hoped for, but it is the right answer. There is no substitute for doing your own homework.