Music is an art form whose medium is sound and silence. Its common elements are pitch, rhythm, dynamics and the sonic qualities of timbre and texture. The word derives from Greek.
The creation, performance, significance and even the definition of music vary according to culture and social context. Music ranges from strictly organized compositions, 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.
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.