One of the best ways to add sound to a site is through the use of Flash's very powerful sound object methods. Using it properly permit your visitor to initiate the playing of a sound file rather than jamming it down your visitor's throat as they hit your page. There's nothing worse. It's never a good idea to force your visitors to reach for the volume control on their local system or, worse yet, hit the back button because they've been startled by a sudden, unwanted burst of what they may feel to be noise.