I tried searching the Groundspeak forums too last night and didn't get anywhere either. I'll try again.

Here's two caches:

History of Morse Code (sound is right there when you open the page)
The Sound of My Cache ( this one you click on a link)

Today the owner of the first one above answered me and said that they don't allow sound directly on the page any longer and that you have to have a link. I'm getting the impression that you need to have a web page of your own set up and upload the sound file there. Now I just have to figure out how to do that since I haven't had any need for my own web page before. Thanks for the responses.