Some players can do the searching for you but basically will only do those which they are able to associate with. Windows Media Player is one such that can search your entire system but some folks don't care for WMP. I believe Apple Quick Time can supplement what WMP can't find but, IMO, QT is worse than WMP. In any event, between these programs, most all music files can be located and listed but will tend to want to do more than just fulfill your request. They want to take charge of what they find, associate themselves with these files and create libraries.