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").

picture of 4 double bass players at canberra school of music

A group of musicians playing double basses. image: R.Conan-Davies

The creation, performance, significance, and even the definition of music vary according to culture and social context.

Music genres vary  

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 personal interpretation, and occasionally controversial. 

Music with the arts

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. 

How music is presented

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. 

The aesthetics of music

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."



Alternative definition

Music can be considered the arrangement of sounds to communicate a message or a state of mind that does not need to have a practical purpose. This is to distinguish from say a real alarm/danger signal. Music, like other art, has an aesthetic quality. 

From a human perspective music is more traditionally viewed as the creation of arrangements of beats, varying tones, pitches, or lengths or pitches and tones. This can be achieved by the human voice, or a combination of musical instruments.

Music is most often classified by it's history or eras or periods.