For Background sound try this code:
 

For Explorer Browsers:      <BGSOUND SRC="yoursound.wav" LOOP=1> Loop can be any number, can also be "infinite". For Netscape Browsers:      <EMBED SRC="yoursound.wav" HIDDEN=true LOOP=1> Loop can be any number, can also be "infinite". ***Both sets of code must be used*** Try it here.

Some sounds you can use.  Download them by 1) right clicking on the link, and 2)saving it to your disk.