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Music is an art form and cultural activity whose medium is sound organized in time. The common elements of music are pitch (which governs melody and harmony), rhythm (and its associated concepts tempo, meter, and articulation), dynamics (loudness and softness), and the sonic qualities of timbre and texture (which are sometimes termed the "color" of a musical sound). Different styles or types of music may emphasize, de-emphasize or omit some of these elements.
Music is composed and performed for many purposes, ranging from aesthetic pleasure, religious or ceremonial purposes, or as an entertainment product for the marketplace.
In the 2000s, notated music is produced as sheet music or, for individuals with computer scorewriter programs, as an image on a computer screen.
"Composition" is the act or practice of creating a song, an instrumental music piece, a work with both singing and instruments, or another type of music.