Prepare your sound in mp3 format in mono with a frequency of 11 or 22 kHz and bitrate (compression) of 64kbps (or more if you would like want a higher quality).

Link Associate the mp3 file to your article as for an image and give it a title and maybe an optional description and a credit. Finally write put in the body of your article where you want <docXX|center|player>. A flash player drive will appear in your public site to allow visitors to listen start the sound.
Warning , please Please note that the maximum max size of a file is 150M, about more or less a length of 225 minutes