Grindcore is an extreme fusion genre of heavy metal and hardcore punk that originated in the mid-1980s, drawing inspiration from abrasive-sounding musical styles, such as thrashcore, crust punk, hardcore punk, extreme metal, and industrial. Grindcore is considered a more noise-filled style of hardcore punk while using hardcore's trademark characteristics such as heavily distorted, down-tuned guitars, grinding overdriven bass, high-speed tempo, blast beats, and vocals which consist of growls, shouts and high-pitched shrieks. Early groups like Napalm Death are credited with laying the groundwork for the style. It is most prevalent today in North America and Europe, with popular contributors such as Brutal Truth and Nasum. Lyrical themes range from a primary focus on social and political concerns, to gory subject matter and black humor.
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 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 includes criticism of The Establishment, opposition to armed conflicts, and at times shares a disdain for the Christian religion with that of black metal. The language is typically direct and denunciatory, an approach borrowed from hardcore punk.
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 genre combining elements of extreme metal and hardcore punk, that originated in the late 1980s. Metalcore is noted for its use of breakdowns, which are slow, intense passages conducive to moshing, while other defining instrumentation includes heavy guitar riffs often utilizing percussive pedal tones and double bass drumming. Vocalists in the genre typically perform screaming, more popular bands often combine this with the use of standard singing, usually during the bridge or chorus of a song. However, the death growl is also a popular technique within the genre.
Dirty Rotten Imbeciles is an American crossover thrash band that formed in Houston in 1982 and would later relocate to San Francisco. The band is currently composed of two of its founding members, lead vocalist Kurt Brecht and guitarist Spike Cassidy, as well as bassist Greg Orr and drummer Rob Rampy.
Hatebreed is an American metalcore band from Bridgeport, Connecticut, formed in 1994. The band released its debut album Satisfaction is the Death of Desire in 1997, which gave the band a cult following. The band signed to Universal Records and released Perseverance in 2002, which hit the Billboard 200. Combining elements of hardcore and heavy metal, the band is often described as a metalcore, hardcore punk, and beatdown hardcore band. They have played a major role in the Connecticut hardcore scene.
Thrashcore is a fast-tempo subgenre of hardcore punk that emerged in the early 1980s. Thrashcore is essentially sped-up hardcore, adopting a slightly more extreme style by means of its vocals, dissonance, and occasional use of blast beats. Songs are usually very brief, and thrashcore is in many ways a less dissonant, minimally metallic forerunner of grindcore. The genre is sometimes associated with the skateboarder subculture.
New York hardcore is both the hardcore punk music created in New York City and the subculture and lifestyle associated with that music. New York hardcore grew out of the hardcore scene established in Washington, D.C., by bands such as Bad Brains and Minor Threat. Initially a local phenomenon of the 1980s and 1990s, New York hardcore eventually grew to establish an international reputation with little to moderate mainstream popularity but with a dedicated and enthusiastic underground following, primarily in Europe and the United States. With a history spanning over more than four decades, many of the early New York hardcore bands are still in activity to this day. Some of them have been continuously or almost continuously active since their formation as well as having reunion shows.
Melodic hardcore is a broadly defined subgenre of hardcore punk with a strong emphasis on melody in its guitar work. It generally incorporates fast rhythms, melodic and often distorted guitar riffs, and vocal styles tending towards shouting and screaming. Nevertheless, the genre has been very diverse, with different bands showcasing very different styles. Many pioneering melodic hardcore bands, have proven influential across the spectrum of punk rock, as well as rock music more generally. The term melodic punk is often used to describe both melodic hardcore and skate punk bands.
Septic Death was an American hardcore punk band active in the 1980s. The foursome from Boise, Idaho was a major influence for the development of grindcore, thrashcore and "speedcore".
A number of overlapping punk rock subgenres have developed since the emergence of punk rock in the mid-1970s. Even though punk genres at times are difficult to segregate, they usually show differing characteristics in overall structures, instrumental and vocal styles, and tempo. However, sometimes a particular trait is common in several genres, and thus punk genres are normally grouped by a combination of traits.
Powerviolence is an extremely dissonant and fast subgenre of hardcore punk which is closely related to thrashcore and grindcore. In contrast with grindcore, which is a "crossover" idiom containing musical aspects of heavy metal, powerviolence is just an augmentation of the most challenging qualities of hardcore punk. Like its predecessors, it is usually socio-politically charged and iconoclastic.
Straight Ahead was an American straight edge hardcore punk band formed in Queens, New York City, in 1984, by drummer and vocalist Tommy Carroll, guitarist Gordon Ancis and bassist Tony Marc Shimkin.
Hardcore punk in the United Kingdom began in the late 1970s and early 1980s with the second wave of punk rock in the country. The scene produced many successful and influential hardcore punk bands throughout the 1980s such as Discharge, GBH and the Exploited and led to the pioneering of genres such as grindcore, street punk, crust punk and D-beat.
