This lets the user link a sound to a page that will play automatically whenever a client opens the webpage.
<bgsound src="music_3.wma" loop="infinite" />
This works like the img tag. It finds the source of the music file that the user wants to be played in the background.
This tells the browser how many times the sound will be played in the background.
A link to a page with more info, then the name of the site the info came from (i.e. W3Schools).