My bad boy found a post at GalleyCAT that has a link to a YouTube video about Booktrack. It turns out Booktrack gives you the ability to add not only music, but sound effects to wherever you want in your ebook.
Our traveling cat captain took the Panzermobile over to the Booktrack site to check it out on his own. He learned Booktrack works with Google Chrome, Opera, and Firefox. (Sorry Internet Explorer users.) There are several links to tutorials for YouTube videos at the site to help you use the service.
If you want to read the GalleyCAT post about Booktrack, tootle over to
Make a Soundtrack to Your Book Using Booktrack - GalleyCat
If you want to jump right into the Booktrack site, tootle over to Booktrack.