I needed to add audio to a site to play some mp3 files. The site is Drupal7, so I decided to check out how to set this up for HTML5 and Flash playback.
I found the Drupal7 module jplayer, which seemed the answer to this need. I downloaded and enabled it. I also had to get the jplayer jQuery code from jplayer.org and put it in sites/all/libraries.