If you have links to these files from multiple pages, you should create an include "Referrer" filter with the path of the home page like http://www.mysite.com/ . If your home page's URL may look differently, you should enter all the different URL variants separated with spaces, for example:
After it you can check statistics for these .mp3 files listed in the Access Statistics report section, as they will list information on requests from these referrers only.
http://www.mysite.com http://www.mysite.com/ http://www.mysite.com/index.html
After it you can check statistics for these .mp3 files listed in the Access Statistics report section, as they will list information on requests from these referrers only.