If it is Windows based which I do know it would have to be MP3 or MP4. If you have Windows media Player which almost everyone does with iTunes, Just go into WMP and scan your computer and it will find any music that is MP3 or 4 like I said and put in into WMP for you , It is that simple and then follow the rest of the instructions as given to you and you will be fine.
By the way Welcome to iMore as well and hope you have fun here as a new member. If you need anything don't hesitate to ask anyone who will be happy to help so jump in and look around all of the many forums and don't forget our Blog side as well for interesting articles.
