Audio Player – WordPress Tutorial Video
UPDATE: Try using the Haiku HTML5 player instead. Much better for cross-platform compatibility because the plugin mentioned in this video uses a Flash player which doesn’t work on tablets.
Adding MP3 files to your site is easy with the Audio Player plugin. This WordPress plugin tutorial explains how to install + configure. Free WordPress Training. For support – try the forums at http://www.wordpress.org so you to get help directly from plugin developers and the WordPress community.