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 μ (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. It may also be divided among
"art music" and "folk music". There is also a strong
connection between music and mathematics.
Music
may be played and heard live, may be part of a dramatic work or film, or may be
recorded. 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."