FORM OF ASSIGNMENT AND LICENSE DOCUMENTS. The form of documents to be executed by Artist, pursuant to Section C. Musical composition can refer to an original piece of music, either a song or an instrumental music piece, the structure of a musical piece, or the process of creating or writing a new song or piece of music. The word "song" is widely misused by people in the popular music industry to describe any musical composition, whether sung or played only by instruments. People who create new compositions are called composers in classical music. In popular music and traditional music, the creators of new songs are usually called songwriters; with songs, the person who writes new words for a song is the lyricist. I didn’t create the contract, but my guess is that it’s written with the idea of a “reversion clause” which is something that songwriters often want to include in any contract they sign with publishers. The idea is that it can be reverted if one or the other writers desires to pull out. Arranging is composition which employs prior material so as to comment upon it such as in mash-ups and various contemporary classical works. The process first requires analysis of existing music, and then rewriting (and often transcription) for an instrumentation other than that for which it was originally intended. If you are using an earlier app then you can still send us a crash log so that we can investigate and try to fix the problem (for all users). The crash log files all start with the app name, and have an extension "crash".