Simon and Garfunkel

Pop music is a genre of popular music which originated in its modern form in the 1950s, deriving from rock and roll. The terms popular music and pop... music are often used interchangeably, even though the former is a description of music which is popular , whilst the latter is a specific genre containing qualities of mass appeal. As a genre, pop music is very eclectic, often borrowing elements from other styles including urban, dance, rock, Latin and country; nonetheless, there are core elements which define pop. Such include generally short-to-medium length songs, written in a basic format , as well as the common employment of repeated choruses, melodic tunes, and catchy hooks. So-called "pure pop" music, such as power pop, features all these elements, utilising electric guitars, drums and bass for instrumentation; in the case of such music, the main goal is usually that of being pleasurable to listen to, rather than having much artistic depth.
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Folk music includes both traditional music and the genre that evolved from it during the 20th century folk revival. The term originated in the 19th... century but is often applied to music that is older than that. Certain types of folk music are also called world music. Traditional folk music has been defined in several ways: as music transmitted by mouth, as music of the lower classes, and as music with unknown composers. It has been contrasted with commercial and classical styles. One meaning often given is that of old songs, with no known composers; another is music that has been transmitted and evolved by a process of oral transmission or performed by custom over a long period of time. Starting in the mid-20th century a new form of popular folk music evolved from traditional folk music. This process and period is called the folk revival and reached a zenith in the 1960s. The most common name for this new form of music is also "folk music", but is often called "contemporary folk music" or "folk revival music" to make the distinction. This type of folk music also includes fusion genres such as folk rock, folk metal, electric folk, and others.
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