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Music is an art form whose medium is sound and silence. Its common elements are pitch (which governs melody and harmony), rhythm (and its associated concepts tempo, meter, and articulation), dynamics, and the sonic qualities of timbre and texture. The word derives from Greek μουσική (mousike; "art of the Muses").

The creation, performance, significance, and even the definition of music vary according to culture and social context. Music ranges from strictly organized compositions (and their recreation in performance), through improvisational music to aleatoric forms. Music can be divided into genres and subgenres, although the dividing lines and relationships between music genres are often subtle, sometimes open to individual interpretation, and occasionally controversial. Within "the arts", music may be classified as a performing art, a fine art, and auditory art. There is also a strong connection between music and mathematics.

To many people in many cultures, music is an important part of their way of life. Ancient Greek and Indian philosophers defined music as tones ordered horizontally as melodies and vertically as harmonies. Common sayings such as "the harmony of the spheres" and "it is music to my ears" point to the notion that music is often ordered and pleasant to listen to. However, 20th-century composer John Cage thought that any sound can be music, saying, for example, "There is no noise, only sound." Musicologist Jean-Jacques Nattiez summarizes the relativist, post-modern viewpoint: "The border between music and noise is always culturally defined—which implies that, even within a single society, this border does not always pass through the same place; in short, there is rarely a consensus ... By all accounts there is no single and intercultural universal concept defining what music might be."

Jonathan Coulton (born December 1, 1970) is an American singer-songwriter, known for his songs about geek culture and his use of the Internet to draw fans. Among his most popular songs are "Code Monkey", "Re: Your Brains", "Still Alive" and "Want You Gone".

A former computer programmer employed at Cluen, a New York City software company, and self-described geek, Coulton tends to write quirky, witty lyrics about science fiction and technology: a man who thinks in simian terms, a mad scientist who falls in love with one of his captives, and the dangers of bacteria. Rare topical songs include 2005's "W's Duty", which sampled President George W. Bush, and 2006's "Tom Cruise Crazy". Most of Coulton's recordings feature his singing over guitar, bass, and drums; some also feature the various other instruments Coulton plays, including accordion, harmonica, mandolin, banjo, ukulele, and glockenspiel.

Coulton graduated in 1993 from Yale, where he was a member of the Yale Whiffenpoofs and the Yale Spizzwinks(?). He is now the Contributing Troubadour at Popular Science magazine, whose September 2005 issue was accompanied by a five-song set by him called Our Bodies, Ourselves, Our Cybernetic Arms. He was also the Musical Director for The Little Gray Book Lectures.