Weekly Review: Mardi Gras all over the world

Rock music is traditionally built on a foundation of simple unsyncopated rhythms in a 4/4 meter, with a repetitive snare drum back beat on beats two and four.[10] Melodies are often derived from older musical modes, including the Dorian and Mixolydian, as well as major and minor modes. The terms "popular music" and "pop music" are often used interchangeably, although the former is a description of music which is popular (and can include any style). Classically, a rock band takes the form of a quartet whose members cover one or more roles, including vocalist, lead guitarist, rhythm guitarist, bass guitarist, drummer and often that of keyboard player or other instrumentalist. Such elements include generally short to medium-length songs, written in a basic format (often the verse-chorus structure), as well as the common employment of repeated choruses, melodic tunes, and hooks. As a genre, pop music is extremely eclectic, often borrowing elements from other styles including urban, dance, rock, Latin and country; nonetheless, there are core elements which define pop.

According to Grove Music Online, the term "pop music" "originated in Britain in the mid-1950s as a description for rock and roll and the new youth music styles that it influenced …".[10] The Oxford Dictionary of Music states that while pop's "earlier meaning meant concerts appealing to a wide audience … Rock music has also embodied and served as the vehicle for cultural and social movements, leading to major sub-cultures including mods and rockers in the UK and the hippie counterculture that spread out from San Francisco in the US in the 1960s. The term "pop song" is first recorded as being used in 1926, in the sense of a piece of music "having popular appeal".[8] Hatch and Millward indicate that many events in the history of recording in the 1920s can be seen as the birth of the modern pop music industry, including in country, blues and hillbilly music.

In the 1940s improved microphone design allowed a more intimate singing style[19] and ten or twenty years later inexpensive and more durable 45 r.p.m. Musically, rock has centered on the electric guitar, usually as part of a rock group with electric bass guitar and drums. It has also made use of technological innovation. Such elements include generally short to medium-length songs, written in a basic format (often the verse-chorus structure), as well as the common employment of repeated choruses, melodic tunes, and hooks. As a genre, pop music is extremely eclectic, often borrowing elements from other styles including urban, dance, rock, Latin and country; nonetheless, there are core elements which define pop. In the 1940s improved microphone design allowed a more intimate singing style[19] and ten or twenty years later inexpensive and more durable 45 r.p.m. Pop music (a term that originally derives from an abbreviation of "popular") is a genre of popular music, which originated in its modern form in the Western world during the 1950s and 1960s, deriving from rock and roll. Like pop music, lyrics often stress romantic love but also address a wide variety of other themes that are frequently social or political in emphasis. Musically, rock has centered on the electric guitar, usually as part of a rock group with electric bass guitar and drums.