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Hard rock is a loosely defined subgenre of rock music that began in the mid-1960s, with the garage, psychedelic and blues rock movements. It is typified by a heavy use of aggressive vocals, distorted electric guitars, bass guitar, drums, and often accompanied with pianos and keyboards. Hard rock developed into a major form of popular music in the 1970s, with bands such as Led Zeppelin, The Who, Deep Purple, Aerosmith, AC/DC and Van Halen. During the 1980s, some hard rock bands moved away from their hard rock roots and more towards pop rock,〔〔V. Bogdanov, C. Woodstra and S. T. Erlewine, ''All Music Guide to Rock: the Definitive Guide to Rock, Pop, and Soul'' (Milwaukee, WI: Backbeat Books, 3rd edn., 2002), ISBN 0-87930-653-X, pp. 903–5.〕 while others began to return to a hard rock sound.〔 Established bands made a comeback in the mid-1980s and it reached a commercial peak in the 1980s, with glam metal bands like Bon Jovi and Def Leppard and the rawer sounds of Guns N' Roses, which followed up with great success in the later part of that decade. Hard rock began losing popularity with the commercial success of grunge and later Britpop in the 1990s. Despite this, many post-grunge bands adopted a hard rock sound and in the 2000s there came a renewed interest in established bands, attempts at a revival, and new hard rock bands that emerged from the garage rock and post-punk revival scenes. In the 2000s, only a few hard rock bands from the 1970s and 1980s managed to sustain highly successful recording careers. ==Definitions== Hard rock is a form of loud, aggressive rock music. The electric guitar is often emphasised, used with distortion and other effects, both as a rhythm instrument using repetitive riffs with a varying degree of complexity, and as a solo lead instrument.〔 Drumming characteristically focuses on driving rhythms, strong bass drum and a backbeat on snare, sometimes using cymbals for emphasis.〔R. Shuker, ''Popular Music: the Key Concepts'', (Abingdon: Routledge, 2nd end., 2005), ISBN 0-415-34770-X, pp. 130–1.〕 The bass guitar works in conjunction with the drums, occasionally playing riffs, but usually providing a backing for the rhythm and lead guitars.〔 Vocals are often growling, raspy, or involve screaming or wailing, sometimes in a high range, or even falsetto voice.〔E. Macan, ''Rocking the Classics: English Progressive Rock and the Counterculture'' (Oxford: Oxford University Press, 1997), ISBN 0-19-509887-0, p. 39.〕 Hard rock has sometimes been labelled cock rock for its emphasis on overt masculinity and sexuality and because it has historically been predominantly performed and consumed by men: in the case of its audience, particularly white, working-class adolescents.〔 In the late 1960s the term heavy metal was used interchangeably with hard rock, but gradually began to be used to describe music played with even more volume and intensity.〔P. Du Noyer, ed., ''The Illustrated Encyclopedia of Music'' (Flame Tree, 2003), ISBN 1-904041-70-1, p. 96.〕 While hard rock maintained a bluesy rock and roll identity, including some swing in the back beat and riffs that tended to outline chord progressions in their hooks, heavy metal's riffs often functioned as stand-alone melodies and had no swing in them.〔.〕 Heavy metal took on "darker" characteristics after Black Sabbath's breakthrough at the beginning of the 1970s. In the 1980s it developed a number of subgenres, often termed extreme metal, some of which were influenced by hardcore punk, and which further differentiated the two styles.〔V. Bogdanov, C. Woodstra and S. T. Erlewine, ''All Music Guide to Rock: the Definitive Guide to Rock, Pop, and Soul'' (Milwaukee, WI: Backbeat Books, 3rd edn., 2002), ISBN 0-87930-653-X, pp. 1332–3.〕 Despite this differentiation, hard rock and heavy metal have existed side by side, with bands frequently standing on the boundary of, or crossing between, the genres.〔R. Walser, ''Running With the Devil: Power, Gender, and Madness in Heavy Metal Music'' (Middletown, CT: Wesleyan University Press, 1993), ISBN 0-8195-6260-2, p. 7.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hard rock」の詳細全文を読む スポンサード リンク
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