Music as literature

Yes, I believe music can be considered literature because it is a poem or a story with a beat with it. Literture is writings in which expression and form, in connection with ideas of permanent and universal interest, are characteristic or essential features, as poetry, novels, history, biography, and essays (dictionary.com). So to me I don't see how music is not literature because it is usually written down and has characteristics, universal intrest, and essential futures. The only difference between music and literature are the instruments used for them nd the beat music has that literature doesn't have.