Heavy metal is a genre of rock music that developed in the late 1960s and early 1970s, largely in the United Kingdom and United States. With roots in blues rock, psychedelic rock and acid rock, heavy metal bands developed a thick, monumental sound characterized by distortion, extended guitar solos, emphatic beats and loudness. The lyrics and performances are usually associated with aggression and machismo, an issue that has sometimes led to accusations of misogyny.
Nu metal is a subgenre of alternative metal that combines elements of heavy metal music with elements of other music genres such as hip hop, alternative rock, funk, industrial, and grunge. Nu metal bands have drawn elements and influences from a variety of musical styles, including multiple genres of heavy metal. Nu metal rarely features guitar solos or other displays of technical competence; the genre is heavily syncopated and based on guitar riffs. Many nu metal guitarists use seven-string guitars that are down-tuned to feature a heavier sound. DJs are occasionally featured in nu metal to provide instrumentation such as sampling, turntable scratching and electronic backgrounds. Vocal styles in nu metal include singing, rapping, screaming and growling. Nu metal is one of the key genres of the new wave of American heavy metal.
Speed metal is an extreme subgenre of heavy metal music that originated in the late 1970s from new wave of British heavy metal (NWOBHM) roots. It is described by AllMusic as "extremely fast, abrasive, and technically demanding" music.
It is usually considered less abrasive and more melodic than thrash metal, showing less influence from hardcore punk. However, speed metal is usually faster and more aggressive than traditional heavy metal, also showing more inclination to virtuoso soloing and featuring short instrumental passages between couplets. Speed metal songs frequently make use of highly expressive vocals, but are usually less likely to employ "harsh" vocals than thrash metal songs.
Hardcore punk is a punk rock music genre and subculture that originated in the late 1970s. It is generally faster, harder, and more aggressive than other forms of punk rock. Its roots can be traced to earlier punk scenes in San Francisco and Southern California which arose as a reaction against the still predominant hippie cultural climate of the time. It was also inspired by Washington D.C. and New York punk rock and early proto-punk. Hardcore punk generally disavows commercialism, the established music industry and "anything similar to the characteristics of mainstream rock" and often addresses social and political topics with "confrontational, politically-charged lyrics."
Thrash metal is an extreme subgenre of heavy metal music characterized by its overall aggression and often fast tempo. The songs usually use fast percussive beats and low-register guitar riffs, overlaid with shredding-style lead guitar work. The lyrical subject matter often deals with criticisms of The Establishment and concern over the destruction of the environment, and at times shares a disdain for Christian dogma resembling that of their black metal counterparts. The language is typically direct and denunciatory, an approach borrowed from hardcore punk.
Hard rock or heavy rock is a loosely defined subgenre of rock music typified by a heavy use of aggressive vocals, distorted electric guitars, bass guitar, and drums, sometimes accompanied with keyboards. It began in the mid-1960s with the garage, psychedelic and blues rock movements. Some of the earliest hard rock music was produced by the Kinks, the Who, the Rolling Stones, the Yardbirds, Cream and the Jimi Hendrix Experience. In the late 1960s, bands such as the Jeff Beck Group, Iron Butterfly, the Beatles, Led Zeppelin, Golden Earring, Steppenwolf and Deep Purple also produced hard rock.
Moshing is an extreme style of dancing in which participants push or slam into each other, typically performed to "aggressive" live music such as heavy metal and punk rock. Moshing usually happens in the centre of the crowd, generally closer to the stage, in an area called the "mosh pit". It is intended to be energetic and full of body contact.
Funk metal is a fusion genre of funk rock and alternative metal which infuses heavy metal music with elements of funk and punk rock. Funk metal was part of the alternative metal movement.
Glam metal is a subgenre of heavy metal that features pop-influenced hooks and guitar riffs, upbeat rock anthems, and slow power ballads. It borrows heavily from the fashion and image of 1970s glam rock.
A metal umlaut is a diacritic that is sometimes used gratuitously or decoratively over letters in the names of hard rock or heavy metal bands—for example, those of Blue Öyster Cult, Queensrÿche, Motörhead, the Accüsed, Mötley Crüe and the parody band Spın̈al Tap.
Alternative metal is a genre of heavy metal music that combines heavy metal with influences from alternative rock and other genres not normally associated with metal. Alternative metal bands are often characterized by heavily downtuned, mid-paced guitar riffs, a mixture of accessible melodic vocals and harsh vocals and sometimes unconventional sounds within other heavy metal styles. The term has been in use since the 1980s, although it came into prominence in the 1990s.
A number of heavy metal genres have developed since the emergence of heavy metal during the late 1960s and early 1970s. At times, heavy metal genres may overlap or are difficult to distinguish, but they can be identified by a number of traits. They may differ in terms of instrumentation, tempo, song structure, vocal style, lyrics, guitar playing style, drumming style, and so on.
Extreme metal is a loosely defined umbrella term for a number of related heavy metal music subgenres that have developed since the early 1980s. It has been defined as a "cluster of metal subgenres characterized by sonic, verbal, and visual transgression".
Metalcore is a fusion music genre that combines elements of extreme metal and hardcore punk. As with other styles blending metal and hardcore, such as crust punk and grindcore, metalcore is noted for its use of breakdowns, slow, intense passages conducive to moshing. Other defining instrumental qualities include heavy riffs and stop-start rhythm guitar playing, occasional blast beats, and double bass drumming. Vocalists in the genre typically use thrash or scream vocals. Some later metalcore bands combine this with clean singing, often during the chorus. Death growls and gang vocals are common. 1990s metalcore bands were inspired by hardcore while later metalcore bands were inspired by melodic death metal bands like At the Gates and In Flames.
Dirty Rotten Imbeciles is an American crossover thrash band that formed in Houston, Texas in 1982. The band is currently composed of two of its founding members, vocalist Kurt Brecht and guitarist Spike Cassidy, as well as drummer Rob Rampy and bass player Greg Orr.
Discharge are an English hardcore punk band formed in 1977 in Stoke-on-Trent, England. The band is known for influencing several sub-genres of extreme music and their songs have been covered by some of the biggest names in heavy metal and other genres. The musical sub-genre of D-beat is named after Discharge and the band's distinctive drumbeat.
Ratos de Porão is a Brazilian crossover thrash band from São Paulo. They were formed in 1981, toured South America, North America, Asia and Europe, and still continue to play today. Their core lineup of João Gordo on vocals and Jão on drums and later guitars has remained since virtually the band's beginning.
Broken Bones are an English hardcore punk band, originally founded in 1983 by Anthony "Bones" Roberts, than later recruited his brother Terence "Tezz" Roberts. They evolved from the band Discharge, and later moved into a style known as crossover. They have released eight albums, three EPs and a number of singles. The band has gone through a number of line-up changes over the years and have toured internationally.
Brazilian thrash metal is a musical movement that originated in the 1980s. Though not as large or well known as the North American or European thrash metal movements, it bridged the gap of the mid-1980s and the death metal scene later in the decade and the first-wave of black metal. Although some bands have become mainstream, the scene is an underground icon.
Crossover thrash is a fusion genre of thrash metal and hardcore punk. The genre lies on a continuum between heavy metal and hardcore punk. Other genres on the same continuum, such as metalcore and grindcore, may overlap with crossover thrash.
