In addition to different styles of music publishing, there also are different types of publishing companies. Songs generate money for the writer when it appears on an album, gets played on the radio, used in a TV show or movie, or sold as sheet music. Being able to keep percent of music revenues can make it worth the extra work for songwriters. Print royalties are derived, as the name suggests, from the sale of printed music materials. Always utilize split sheets when collaborating on a song. The PRO then tracks the usage of the songs and pays through the royalties due from the performance of those songs.