Copyright is a difficult issue in today's media market, especially when it comes to filmmaking. Much of filmmaking involves colliding separately created works, such as music or visual work, into one final product. Though you are creating a wholly new product with the aid of some of these pieces, you still do not always have the legal right to use them. When it comes to sound there are still some special rights that are different than video or still photo material. When you are trying to get the ability to use a certain bit of copyrighted sound you are looking to get synchronization rights.