Rock music is a genre of popular music that developed during and after the 1960s, particularly in the United Kingdom and the United States. It has its roots in 1940s and 1950s rock and roll, itself heavily influenced by rhythm and blues and country music. Rock music also drew strongly on a number of other genres such as blues and folk, and incorporated influences from jazz, classical and other musical sources.
Musically, rock has centred around the electric guitar, usually as part of a rock group with bass guitar and drums. Typically, rock is song-based music with a 4/4 beat utilizing a verse-chorus form, but the genre has become extremely diverse and common musical characteristics are difficult to define. 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. The dominance of rock by white, male musicians has been seen as one of the key factors shaping the themes explored in rock music. Rock places a higher degree of emphasis on musicianship, live performance, and an ideology of authenticity than pop music.
By the late 1960s a number of distinct rock music sub-genres had emerged, including hybrids like blues rock, folk rock, country rock, and jazz-rock fusion, many of which contributed to the development of psychedelic rock influenced by the counter-cultural psychedelic scene. New genres that emerged from this scene included progressive rock, which extended the artistic elements; glam rock, which highlighted showmanship and visual style, and the diverse and enduring major sub-genre of heavy metal, which emphasized volume, power and speed. In the second half of the 1970s, punk rock both intensified and reacted against some of these trends to produce a raw, energetic form of music characterized by overt political and social critiques. Punk was an influence into the 1980s on the subsequent development of other sub-genres, including New Wave, post-punk and eventually the alternative rock movement. From the 1990s alternative rock began to dominate rock music and break through into the mainstream in the form of grunge, Britpop, and indie rock. Further fusion sub-genres have since emerged, including pop punk, rap rock, and rap metal, as well as conscious attempts to revisit rock's history, including the garage rock/post-punk and synthpop revivals at the beginning of the new millennium.
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. Similarly, 1970s punk culture spawned the visually distinctive goth and emo subcultures. Inheriting the folk tradition of the protest song, rock music has been associated with political activism as well as changes in social attitudes to race, sex and drug use, and is often seen as an expression of youth revolt against adult consumerism and conformity.Progressive rock, a term sometimes used interchangeably with art rock, was an attempt to move beyond established musical formulas by experimenting with different instruments, song types, and forms.[103] From the mid-1960s The Left Banke, The Beatles, The Rolling Stones and The Beach Boys, had pioneered the inclusion of harpsichords, wind and string sections on their recordings to produce a form of Baroque rock and can be heard in singles like Procol Harum's "A Whiter Shade of Pale" (1967), with its Bach inspired introduction.[104] The Moody Blues used a full orchestra on their album Days of Future Passed (1967) and subsequently created orchestral sounds with synthesisers.[103] Classical orchestration, keyboards and synthesisers were a frequent edition to the established rock format of guitars, bass and drums in subsequent progressive rock.[105]
Instrumentals were common, while songs with lyrics were sometimes conceptual, abstract, or based in fantasy and science fiction.[106] The Pretty Things' SF Sorrow (1968), The Who's Tommy (1969) and The Kinks' Arthur (Or the Decline and Fall of the British Empire) (1969) introduced the format of rock operas and opened the door to concept albums, often telling an epic story or tackling a grand overarching theme.[107] King Crimson's 1969 début album, In the Court of the Crimson King, which mixed powerful guitar riffs and mellotron, with jazz and symphonic music, is often taken as the key recording in progressive rock, helping the widespread adoption of the genre in the early 1970s among existing blues-rock and psychedelic bands, as well as newly formed acts.[103]
The vibrant Canterbury scene saw acts following Soft Machine from psychedelia, through jazz influences, toward more expansive hard rock, including Caravan, Hatfield and the North, Gong, and National Health.[108] Greater commercial success was enjoyed by Pink Floyd, who also moved away from psychedelia after the departure of Syd Barrett in 1968, with Dark Side of the Moon (1973), seen as a masterpiece of the genre, becoming one of the best-selling albums of all time.[109] There was an emphasis on instrumental virtuosity, with Yes showcasing the skills of both guitarist Steve Howe and keyboard player Rick Wakeman, while Emerson, Lake & Palmer were a supergroup who produced some of the genre's most technically demanding work.[103] Jethro Tull and Genesis both pursued very different, but distinctly English, brands of music.[110] Renaissance, formed in 1969 by ex-Yardbirds Jim McCarty and Keith Relf, evolved into a high-concept band featuring the three-octave voice of Annie Haslam.[111] Most British bands depended on a relatively small cult following, but a handful, including Pink Floyd, Genesis and Jethro Tull, managed to produce top ten singles at home and break the American market.[112]
The American brand of prog rock varied from the eclectic and innovative Frank Zappa, Captain Beefheart and Blood, Sweat and Tears,[113] to more pop rock orientated bands like Boston, Foreigner, Kansas, Journey and Styx.[103] These, beside British bands Supertramp and ELO, all demonstrated a prog rock influence and while ranking among the most commercially successful acts of the 1970s, issuing in the era of pomp or arena rock, which would last until the costs of complex shows (often with theatrical staging and special effects), would be replaced by more economical rock festivals as major live venues in the 1990s.[114]
The instrumental strand of the genre resulted in albums like Mike Oldfield's Tubular Bells (1973), the first record, and worldwide hit, for the Virgin Records label, which became a mainstay of the genre.[103] Instrumental rock was particularly significant in continental Europe, allowing bands like Kraftwerk, Tangerine Dream, Can and Faust to circumvent the language barrier.[115] Their synthesiser-heavy "Kraut rock", along with the work of Brian Eno (for a time the keyboard player with Roxy Music), would be a major influence on subsequent synth rock.[103] With the advent of punk rock and technological changes in the late 1970s, progressive rock was increasingly dismissed as pretentious and overblown.[116][117] Many bands broke up, but some, including Genesis, ELP, Yes, and Pink Floyd, regularly scored top ten albums with successful accompanying worldwide tours.[64] Some bands which emerged in the aftermath of punk, such as Siouxsie and the Banshees, Ultravox and Simple Minds, showed the influence of prog, as well as their more usually recognized punk influences.[
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