Genres of music are determined as much by tradition and presentation as by the particular music. Some is effective, like George Gershwin's Rhapsody in Blue, are claimed by both of those jazz and classical music, whilst Gershwin's Porgy and Bess and Leonard Bernstein's West Side Tale are claimed by both of those opera as well as the Broadway musical

The study of composition has ordinarily been dominated by assessment of methods and practice of Western classical music, though the definition of composition is wide adequate to incorporate the development of well-known music and classic music tracks and instrumental items as well as spontaneously improvised works like These of free jazz performers