youre gona have to provide a tad more info than this.. What are you serving them with?
If apache, and you have access to its logs (eg. you are the system administrator / have access to /var/log/) you could just run this command set:
Code:
tail -f /var/log/apache/access_log | grep -E "\.mp3|\.wma|\.otherFormat"
Just add other filetypes to the list.. (:
The regexp is just: \ to escape the . character + the string we search for .mp3 and then the new entry thats an alternative to finding this seperated with a | .. the list can be as long as you need