Chicago the City of Chicago, is the most populous city in Illinois, as well as the third most populous city in the United States. With an estimated population of 2,716,450, it is the most populous city in the Midwest. Chicago is the principal city of the Chicago metropolitan area referred to as Chicagoland, the county seat of Cook County, the second most populous county in the United States; the metropolitan area, at nearly 10 million people, is the third-largest in the United States, the fourth largest in North America and the third largest metropolitan area in the world by land area. Located on the shores of freshwater Lake Michigan, Chicago was incorporated as a city in 1837 near a portage between the Great Lakes and the Mississippi River watershed and grew in the mid-nineteenth century. After the Great Chicago Fire of 1871, which destroyed several square miles and left more than 100,000 homeless, the city made a concerted effort to rebuild; the construction boom accelerated population growth throughout the following decades, by 1900 Chicago was the fifth largest city in the world.
Chicago made noted contributions to urban planning and zoning standards, including new construction styles, the development of the City Beautiful Movement, the steel-framed skyscraper. Chicago is an international hub for finance, commerce, technology, telecommunications, transportation, it is the site of the creation of the first standardized futures contracts at the Chicago Board of Trade, which today is the largest and most diverse derivatives market gobally, generating 20% of all volume in commodities and financial futures. O'Hare International Airport is the one of the busiest airports in the world, the region has the largest number of U. S. highways and greatest amount of railroad freight. In 2012, Chicago was listed as an alpha global city by the Globalization and World Cities Research Network, it ranked seventh in the entire world in the 2017 Global Cities Index; the Chicago area has one of the highest gross domestic products in the world, generating $680 billion in 2017. In addition, the city has one of the world's most diversified and balanced economies, not being dependent on any one industry, with no single industry employing more than 14% of the workforce.
Chicago's 58 million domestic and international visitors in 2018, made it the second most visited city in the nation, behind New York City's approximate 65 million visitors. The city ranked first place in the 2018 Time Out City Life Index, a global quality of life survey of 15,000 people in 32 cities. Landmarks in the city include Millennium Park, Navy Pier, the Magnificent Mile, the Art Institute of Chicago, Museum Campus, the Willis Tower, Grant Park, the Museum of Science and Industry, Lincoln Park Zoo. Chicago's culture includes the visual arts, film, comedy and music jazz, soul, hip-hop and electronic dance music including house music. Of the area's many colleges and universities, the University of Chicago, Northwestern University, the University of Illinois at Chicago are classified as "highest research" doctoral universities. Chicago has professional sports teams in each of the major professional leagues, including two Major League Baseball teams; the name "Chicago" is derived from a French rendering of the indigenous Miami-Illinois word shikaakwa for a wild relative of the onion, known to botanists as Allium tricoccum and known more as ramps.
The first known reference to the site of the current city of Chicago as "Checagou" was by Robert de LaSalle around 1679 in a memoir. Henri Joutel, in his journal of 1688, noted that the eponymous wild "garlic" grew abundantly in the area. According to his diary of late September 1687:...when we arrived at the said place called "Chicagou" which, according to what we were able to learn of it, has taken this name because of the quantity of garlic which grows in the forests in this region. The city has had several nicknames throughout its history such as the Windy City, Chi-Town, Second City, the City of the Big Shoulders, which refers to the city's numerous skyscrapers and high-rises. In the mid-18th century, the area was inhabited by a Native American tribe known as the Potawatomi, who had taken the place of the Miami and Sauk and Fox peoples; the first known non-indigenous permanent settler in Chicago was Jean Baptiste Point du Sable. Du Sable arrived in the 1780s, he is known as the "Founder of Chicago".
In 1795, following the Northwest Indian War, an area, to be part of Chicago was turned over to the United States for a military post by native tribes in accordance with the Treaty of Greenville. In 1803, the United States Army built Fort Dearborn, destroyed in 1812 in the Battle of Fort Dearborn and rebuilt; the Ottawa and Potawatomi tribes had ceded additional land to the United States in the 1816 Treaty of St. Louis; the Potawatomi were forcibly removed from their land after the Treaty of Chicago in 1833. On August 12, 1833, the Town of Chicago was organized with a population of about 200. Within seven years it grew to more than 4,000 people. On June 15, 1835, the first public land sales began with Edmund Dick Taylor as U. S. Receiver of Public Monies; the City of Chicago was incorporated on Saturday, March 4, 1837, for several decades was the world's fastest-growing city. As the site of the Chicago Portage, the city became an important transportation hub between the eastern and western United States.
Chicago's first railway and Chicago Union Railroad, the Illi
Manowar is an American heavy metal band from Auburn, New York. Formed in 1980, the group is known for lyrics based on mythology; the band is known for a loud and bombastic sound. In an interview for MTV in February 2007, bassist Joey DeMaio lamented that "these days, there's a real lack of big, epic metal, drenched with crushing guitars and choirs and orchestras... so it's nice to be one of the few bands that's doing that". In 1984 the band was included in the Guinness Book of World Records for delivering the loudest performance, a record which they have since broken on two occasions, they hold the world record for the longest heavy metal concert after playing for five hours and 1 minute in Bulgaria in 2008. They have been known for their slogan "Death to false metal". Although the band has never been a mainstream commercial success in the United States, they maintain a strong cult following. Dedicated fans are known and referred to by the band as "Metal Warriors", "Manowarriors", "Immortals" or "Brothers of Metal".
Manowar's history began in 1980 when Joey DeMaio, the future bassist of the band met guitarist Ross the Boss while working as a bass tech and fireworks manager for Black Sabbath on the Heaven and Hell tour. Ross the Boss, a former member of the punk rock band The Dictators, was the guitar player in Black Sabbath's support band, Shakin' Street; the two bonded over their shared musical interests, became friends and decided to form a band with the suggestion and advice of Ronnie James Dio during the tour. At the end of the tour with Black Sabbath, the duo got together to form Manowar. To complete the roster, they hired a former classmate and friend of DeMaio. On the strength of their debut demo, Manowar secured a recording contract with label Liberty Records in 1981; the label pressured the band to produce a good number of songs in a short time towards a debut album. The resultant album, Battle Hymns, was released the following year; the legendary actor and director Orson Welles served in the role of narrator on "Dark Avenger".
Soon after the album's release, Manowar engaged in their first tour. The band played support for hard rocker Ted Nugent, but their collaboration lasted only a few months. Manowar decided to put together a short tour by themselves and all the arrangements were made in a few weeks by their manager. Despite these setbacks, the band gained domestic fame on this short tour and began to get their first European fans in the United Kingdom and in Germany. Stressed from the strain of the continuing performances, drummer Donnie Hamzik decided to leave the band at the end of this tour and was replaced with Scott Columbus. By 1983, the band left Liberty Records and struck a deal with Megaforce Records in the US and Music for Nations in Europe—signing the contract in their own blood; the signing was a cover story in the 1983 July–August issue No. 47 of Kerrang!. When Manowar returned home, they went into a recording studio to produce what, in the intentions of the group, would have been a simple EP, but came out instead, due to the quantity and quality of the tracks made in that period, as the band's second album, Into Glory Ride.
An EP was published in 1983 with the title Defender containing, as its main track, the eponymous song, which included more work by Orson Welles. The atmosphere of the album evoked classical heroic fantasy and mythology, served as a predecessor to Viking metal, it contained several innovative features, both in style and sound, led to a huge increase in the number of fans of the group in the United Kingdom, where the band planned a long tour, canceled. The song "Defender" was re-recorded and included in the Fighting the World album of 1987. To apologize for the failure of their UK tour, Manowar decided to dedicate their next album to the United Kingdom; the album, Hail to England, was recorded and mixed in just six days and was released in early 1984. Its promotional tour, "Spectacle of Might", had a large number of dates in England; the tour saw Manowar as support band for Mercyful Fate, but soon the group led by DeMaio was put in the headline slot. Manowar soon returned to work in the recording studio.
After leaving Music for Nations, the quartet released Sign of the Hammer ten months after their previous album. The new record presented stark changes in rhythm, with technical tracks characterized by a slow pace, like the epic "Mountains", quick ones, as the eponymous "Sign of the Hammer", its success enabled band to embark on a two-year world tour. Following further disagreements with their new label, the group changed record label to Atlantic Records in 1987. Via Atlantic, they released Fighting the World, which enjoyed more extensive distribution and increased the band's prominence in the international heavy metal scene. Album art was designed by Ken Kelly. In 1988, Manowar released the album Kings of Metal, the band's best known work. Songs like "Heart of Steel", "Kings of Metal" and "Hail and Kill" are performed in concerts. Kings of Metal is Manowar's highest-selling album worldwide. Manowar embarked on a world tour, for a period of three years, with stops in all European nations. During that tour, Joey DeMaio "fired" Ross the Boss.
According to a 2008 interview with the guitarist, "Joey felt that Manowar would be better without me". He was replaced by David Shankle, chosen by members of the band after a search among about 150 candidates. Scott Columbus also decided to leave the band during the Kings of Metal tour. Columbus himself picked his replacement Kenny Earl Edwards
A keyboard instrument is a musical instrument played using a keyboard, a row of levers which are pressed by the fingers. The most common of these are the piano and various electronic keyboards, including synthesizers and digital pianos. Other keyboard instruments include celestas, which are struck idiophones operated by a keyboard, carillons, which are housed in bell towers or belfries of churches or municipal buildings. Today, the term keyboard refers to keyboard-style synthesizers. Under the fingers of a sensitive performer, the keyboard may be used to control dynamics, shading and other elements of expression—depending on the design and inherent capabilities of the instrument. Another important use of the word keyboard is in historical musicology, where it means an instrument whose identity cannot be established. In the 18th century, the harpsichord, the clavichord, the early piano were in competition, the same piece might be played on more than one. Hence, in a phrase such as "Mozart excelled as a keyboard player," the word keyboard is all-inclusive.
The earliest known keyboard instrument was the Ancient Greek hydraulis, a type of pipe organ, invented in the third century BC. The keys were balanced and could be played with a light touch, as is clear from the reference in a Latin poem by Claudian, who says magna levi detrudens murmura tactu... intent, “let him thunder forth as he presses out mighty roarings with a light touch”. From its invention until the fourteenth century, the organ remained the only keyboard instrument; the organ did not feature a keyboard at all, but rather buttons or large levers operated by a whole hand. Every keyboard until the fifteenth century had seven naturals to each octave; the clavichord and the harpsichord appeared during the fourteenth century—the clavichord being earlier. The harpsichord and clavichord were both common until widespread adoption of the piano in the eighteenth century, after which their popularity decreased; the piano was revolutionary because a pianist could vary the volume of the sound by varying the vigor with which each key was struck.
The piano's full name is gravicèmbalo con piano e forte meaning harpsichord with soft and loud but can be shortened to piano-forte, which means soft-loud in Italian. In its current form, the piano is a product of the late nineteenth century, is far removed in both sound and appearance from the "pianos" known to Mozart and Beethoven. In fact, the modern piano is different from the 19th-century pianos used by Liszt and Brahms. See Piano history and musical performance. Keyboard instruments were further developed in the early twentieth century. Early electromechanical instruments, such as the Ondes Martenot, appeared early in the century; this was a important contribution to the keyboard's history. Much effort has gone into creating an instrument that sounds like the piano but lacks its size and weight; the electric piano and electronic piano were early efforts that, while useful instruments in their own right, did not convincingly reproduce the timbre of the piano. Electric and electronic organs were developed during the same period.
More recent electronic keyboard designs strive to emulate the sound of specific make and model pianos using digital samples and computer models. Each acoustic keyboard contains 88 keys. Weighted keys, found on electronic keyboards, are designed to simulate the resistance of a key on an acoustic keyboard, via pressurization. There are 4 types of weighted keys. Keybeds, or non-weighted keys place the weights within the base of the keyboard; the second type, Semi-weighted uses springs, the third type is hammer keys. Most electronic keyboards use the fourth type: graded simulate keys. Weighted keys are made of wood, or metal/wood substitute. Enharmonic keyboard Musical instrument Orchestrina di camera Piano Symphony Young, Percy M. Keyboard Musicians of the World. London: Abelard-Schuman, 1967. N. B.: Concerns celebrated keyboard players and the various such instruments used over the centuries. ISBN 0-200-71497-X The general keyboard in the age of MIDI Renaissance Keyboards on the Heilbrunn Timeline of Art History, The Metropolitan Museum of Art The Pianofortes of Bartolomeo Cristofori on the Heilbrunn Timeline of Art History, The Metropolitan Museum of Art
MusicBrainz is a project that aims to create an open data music database, similar to the freedb project. MusicBrainz was founded in response to the restrictions placed on the Compact Disc Database, a database for software applications to look up audio CD information on the Internet. MusicBrainz has expanded its goals to reach beyond a compact disc metadata storehouse to become a structured open online database for music. MusicBrainz captures information about artists, their recorded works, the relationships between them. Recorded works entries capture at a minimum the album title, track titles, the length of each track; these entries are maintained by volunteer editors. Recorded works can store information about the release date and country, the CD ID, cover art, acoustic fingerprint, free-form annotation text and other metadata; as of 21 September 2018, MusicBrainz contained information about 1.4 million artists, 2 million releases, 19 million recordings. End-users can use software that communicates with MusicBrainz to add metadata tags to their digital media files, such as FLAC, MP3, Ogg Vorbis or AAC.
MusicBrainz allows contributors to upload cover art images of releases to the database. Internet Archive provides the bandwidth and legal protection for hosting the images, while MusicBrainz stores metadata and provides public access through the web and via an API for third parties to use; as with other contributions, the MusicBrainz community is in charge of maintaining and reviewing the data. Cover art is provided for items on sale at Amazon.com and some other online resources, but CAA is now preferred because it gives the community more control and flexibility for managing the images. Besides collecting metadata about music, MusicBrainz allows looking up recordings by their acoustic fingerprint. A separate application, such as MusicBrainz Picard, must be used for this. In 2000, MusicBrainz started using Relatable's patented TRM for acoustic fingerprint matching; this feature allowed the database to grow quickly. However, by 2005 TRM was showing scalability issues as the number of tracks in the database had reached into the millions.
This issue was resolved in May 2006 when MusicBrainz partnered with MusicIP, replacing TRM with MusicDNS. TRMs were phased out and replaced by MusicDNS in November 2008. In October 2009 MusicIP was acquired by AmpliFIND; some time after the acquisition, the MusicDNS service began having intermittent problems. Since the future of the free identification service was uncertain, a replacement for it was sought; the Chromaprint acoustic fingerprinting algorithm, the basis for AcoustID identification service, was started in February 2010 by a long-time MusicBrainz contributor Lukáš Lalinský. While AcoustID and Chromaprint are not MusicBrainz projects, they are tied with each other and both are open source. Chromaprint works by analyzing the first two minutes of a track, detecting the strength in each of 12 pitch classes, storing these 8 times per second. Additional post-processing is applied to compress this fingerprint while retaining patterns; the AcoustID search server searches from the database of fingerprints by similarity and returns the AcoustID identifier along with MusicBrainz recording identifiers if known.
Since 2003, MusicBrainz's core data are in the public domain, additional content, including moderation data, is placed under the Creative Commons CC-BY-NC-SA-2.0 license. The relational database management system is PostgreSQL; the server software is covered by the GNU General Public License. The MusicBrainz client software library, libmusicbrainz, is licensed under the GNU Lesser General Public License, which allows use of the code by proprietary software products. In December 2004, the MusicBrainz project was turned over to the MetaBrainz Foundation, a non-profit group, by its creator Robert Kaye. On 20 January 2006, the first commercial venture to use MusicBrainz data was the Barcelona, Spain-based Linkara in their Linkara Música service. On 28 June 2007, BBC announced that it has licensed MusicBrainz's live data feed to augment their music Web pages; the BBC online music editors will join the MusicBrainz community to contribute their knowledge to the database. On 28 July 2008, the beta of the new BBC Music site was launched, which publishes a page for each MusicBrainz artist.
Amarok – KDE audio player Banshee – multi-platform audio player Beets – automatic CLI music tagger/organiser for Unix-like systems Clementine – multi-platform audio player CDex – Microsoft Windows CD ripper Demlo – a dynamic and extensible music manager using a CLI iEatBrainz – Mac OS X deprecated foo_musicbrainz component for foobar2000 – Music Library/Audio Player Jaikoz – Java mass tag editor Max – Mac OS X CD ripper and audio transcoder Mp3tag – Windows metadata editor and music organizer MusicBrainz Picard – cross-platform album-oriented tag editor MusicBrainz Tagger – deprecated Microsoft Windows tag editor puddletag – a tag editor for PyQt under the GPLv3 Rhythmbox music player – an audio player for Unix-like systems Sound Juicer – GNOME CD ripper Zortam Mp3 Media Studio – Windows music organizer and ID3 Tag Editor. Freedb clients can access MusicBrainz data through the freedb protocol by using the MusicBrainz to FreeDB gateway service, mb2freedb. List of online music databases Making Metadata: The Case of Mus
The United States of America known as the United States or America, is a country composed of 50 states, a federal district, five major self-governing territories, various possessions. At 3.8 million square miles, the United States is the world's third or fourth largest country by total area and is smaller than the entire continent of Europe's 3.9 million square miles. With a population of over 327 million people, the U. S. is the third most populous country. The capital is Washington, D. C. and the largest city by population is New York City. Forty-eight states and the capital's federal district are contiguous in North America between Canada and Mexico; the State of Alaska is in the northwest corner of North America, bordered by Canada to the east and across the Bering Strait from Russia to the west. The State of Hawaii is an archipelago in the mid-Pacific Ocean; the U. S. territories are scattered about the Pacific Ocean and the Caribbean Sea, stretching across nine official time zones. The diverse geography and wildlife of the United States make it one of the world's 17 megadiverse countries.
Paleo-Indians migrated from Siberia to the North American mainland at least 12,000 years ago. European colonization began in the 16th century; the United States emerged from the thirteen British colonies established along the East Coast. Numerous disputes between Great Britain and the colonies following the French and Indian War led to the American Revolution, which began in 1775, the subsequent Declaration of Independence in 1776; the war ended in 1783 with the United States becoming the first country to gain independence from a European power. The current constitution was adopted in 1788, with the first ten amendments, collectively named the Bill of Rights, being ratified in 1791 to guarantee many fundamental civil liberties; the United States embarked on a vigorous expansion across North America throughout the 19th century, acquiring new territories, displacing Native American tribes, admitting new states until it spanned the continent by 1848. During the second half of the 19th century, the Civil War led to the abolition of slavery.
By the end of the century, the United States had extended into the Pacific Ocean, its economy, driven in large part by the Industrial Revolution, began to soar. The Spanish–American War and World War I confirmed the country's status as a global military power; the United States emerged from World War II as a global superpower, the first country to develop nuclear weapons, the only country to use them in warfare, a permanent member of the United Nations Security Council. Sweeping civil rights legislation, notably the Civil Rights Act of 1964, the Voting Rights Act of 1965 and the Fair Housing Act of 1968, outlawed discrimination based on race or color. During the Cold War, the United States and the Soviet Union competed in the Space Race, culminating with the 1969 U. S. Moon landing; the end of the Cold War and the collapse of the Soviet Union in 1991 left the United States as the world's sole superpower. The United States is the world's oldest surviving federation, it is a representative democracy.
The United States is a founding member of the United Nations, World Bank, International Monetary Fund, Organization of American States, other international organizations. The United States is a developed country, with the world's largest economy by nominal GDP and second-largest economy by PPP, accounting for a quarter of global GDP; the U. S. economy is post-industrial, characterized by the dominance of services and knowledge-based activities, although the manufacturing sector remains the second-largest in the world. The United States is the world's largest importer and the second largest exporter of goods, by value. Although its population is only 4.3% of the world total, the U. S. holds 31% of the total wealth in the world, the largest share of global wealth concentrated in a single country. Despite wide income and wealth disparities, the United States continues to rank high in measures of socioeconomic performance, including average wage, human development, per capita GDP, worker productivity.
The United States is the foremost military power in the world, making up a third of global military spending, is a leading political and scientific force internationally. In 1507, the German cartographer Martin Waldseemüller produced a world map on which he named the lands of the Western Hemisphere America in honor of the Italian explorer and cartographer Amerigo Vespucci; the first documentary evidence of the phrase "United States of America" is from a letter dated January 2, 1776, written by Stephen Moylan, Esq. to George Washington's aide-de-camp and Muster-Master General of the Continental Army, Lt. Col. Joseph Reed. Moylan expressed his wish to go "with full and ample powers from the United States of America to Spain" to seek assistance in the revolutionary war effort; the first known publication of the phrase "United States of America" was in an anonymous essay in The Virginia Gazette newspaper in Williamsburg, Virginia, on April 6, 1776. The second draft of the Articles of Confederation, prepared by John Dickinson and completed by June 17, 1776, at the latest, declared "The name of this Confederation shall be the'United States of America'".
The final version of the Articles sent to the states for ratification in late 1777 contains the sentence "The Stile of this Confederacy shall be'The United States of America'". In June 1776, Thomas Jefferson wrote the phrase "UNITED STATES OF AMERICA" in all capitalized letters in the headline of his "original Rough draught" of the Declaration of Independence; this draft of the document did not surface unti
Heavy metal music
Heavy metal is a genre of rock music that developed in the late 1960s and early 1970s in the United Kingdom. With roots in blues rock, psychedelic rock, acid rock, the bands that created heavy metal developed a thick, massive sound, characterized by amplified distortion, extended guitar solos, emphatic beats, overall loudness; the genre's lyrics and performance styles are sometimes associated with machismo. In 1968, three of the genre's most famous pioneers, Led Zeppelin, Black Sabbath and Deep Purple were founded. Though they came to attract wide audiences, they were derided by critics. During the mid-1970s, Judas Priest helped spur the genre's evolution by discarding much of its blues influence. Beginning in the late 1970s, bands in the new wave of British heavy metal such as Iron Maiden and Def Leppard followed in a similar vein. Before the end of the decade, heavy metal fans became known as "metalheads" or "headbangers". During the 1980s, glam metal became popular with groups such as Mötley Crüe.
Underground scenes produced an array of more aggressive styles: thrash metal broke into the mainstream with bands such as Metallica, Slayer and Anthrax, while other extreme subgenres of heavy metal such as death metal and black metal remain subcultural phenomena. Since the mid-1990s popular styles have further expanded the definition of the genre; these include groove metal and nu metal, the latter of which incorporates elements of grunge and hip hop. Heavy metal is traditionally characterized by loud distorted guitars, emphatic rhythms, dense bass-and-drum sound, vigorous vocals. Heavy metal subgenres variously alter, or omit one or more of these attributes; the New York Times critic Jon Pareles writes, "In the taxonomy of popular music, heavy metal is a major subspecies of hard-rock—the breed with less syncopation, less blues, more showmanship and more brute force." The typical band lineup includes a drummer, a bassist, a rhythm guitarist, a lead guitarist, a singer, who may or may not be an instrumentalist.
Keyboard instruments are sometimes used to enhance the fullness of the sound. Deep Purple's Jon Lord played an overdriven Hammond organ. In 1970, John Paul Jones used a Moog synthesizer on Led Zeppelin III; the electric guitar and the sonic power that it projects through amplification has been the key element in heavy metal. The heavy metal guitar sound comes from a combined use of heavy distortion. For classic heavy metal guitar tone, guitarists maintain moderate levels gain at moderate levels, without excessive preamp or pedal distortion, to retain open spaces and air in the music. Thrash metal guitar tone has scooped mid-frequencies and compressed sound with lots of bass frequencies. Guitar solos are "an essential element of the heavy metal code... that underscores the significance of the guitar" to the genre. Most heavy metal songs "feature at least one guitar solo", "a primary means through which the heavy metal performer expresses virtuosity"; some exceptions are nu grindcore bands, which tend to omit guitar solos.
With rhythm guitar parts, the "heavy crunch sound in heavy metal... palm muting" the strings with the picking hand and using distortion. Palm muting creates a tighter, more precise sound and it emphasizes the low end; the lead role of the guitar in heavy metal collides with the traditional "frontman" or bandleader role of the vocalist, creating a musical tension as the two "contend for dominance" in a spirit of "affectionate rivalry". Heavy metal "demands the subordination of the voice" to the overall sound of the band. Reflecting metal's roots in the 1960s counterculture, an "explicit display of emotion" is required from the vocals as a sign of authenticity. Critic Simon Frith claims; the prominent role of the bass is key to the metal sound, the interplay of bass and guitar is a central element. The bass guitar provides the low-end sound crucial to making the music "heavy"; the bass plays a "more important role in heavy metal than in any other genre of rock". Metal basslines vary in complexity, from holding down a low pedal point as a foundation to doubling complex riffs and licks along with the lead or rhythm guitars.
Some bands feature the bass as a lead instrument, an approach popularized by Metallica's Cliff Burton with his heavy emphasis on bass guitar solos and use of chords while playing bass in the early 1980s. Lemmy of Motörhead played overdriven power chords in his bass lines; the essence of heavy metal drumming is creating a loud, constant beat for the band using the "trifecta of speed and precision". Heavy metal drumming "requires an exceptional amount of endurance", drummers have to develop "considerable speed and dexterity... to play the intricate patterns" used in heavy metal. A characteristic metal drumming technique is the cymbal choke, which consists of striking a cymbal and immediately silencing it by grabbing it with the other hand, producing a burst of sound; the metal drum setup is much larger than those employed in other forms of rock music. Black metal, death metal and some "mainstream metal" bands "all depend upon double-kicks and blast beats". In live performance, loudness—an "onslaught of sound", in sociologist Deena Weinstein's description—is considered vital.
In his book Metalheads, psychologist Jeffrey Arnett refers to heavy me
The guitar is a fretted musical instrument that has six strings. It is played with both hands by strumming or plucking the strings with either a guitar pick or the finger/fingernails of one hand, while fretting with the fingers of the other hand; the sound of the vibrating strings is projected either acoustically, by means of the hollow chamber of the guitar, or through an electrical amplifier and a speaker. The guitar is a type of chordophone, traditionally constructed from wood and strung with either gut, nylon or steel strings and distinguished from other chordophones by its construction and tuning; the modern guitar was preceded by the gittern, the vihuela, the four-course Renaissance guitar, the five-course baroque guitar, all of which contributed to the development of the modern six-string instrument. There are three main types of modern acoustic guitar: the classical guitar, the steel-string acoustic guitar, the archtop guitar, sometimes called a "jazz guitar"; the tone of an acoustic guitar is produced by the strings' vibration, amplified by the hollow body of the guitar, which acts as a resonating chamber.
The classical guitar is played as a solo instrument using a comprehensive finger-picking technique where each string is plucked individually by the player's fingers, as opposed to being strummed. The term "finger-picking" can refer to a specific tradition of folk, blues and country guitar playing in the United States; the acoustic bass guitar is a low-pitched instrument, one octave below a regular guitar. Electric guitars, introduced in the 1930s, use an amplifier and a loudspeaker that both makes the sound of the instrument loud enough for the performers and audience to hear, given that it produces an electric signal when played, that can electronically manipulate and shape the tone using an equalizer and a huge variety of electronic effects units, the most used ones being distortion and reverb. Early amplified guitars employed a hollow body, but solid wood guitars began to dominate during the 1960s and 1970s, as they are less prone to unwanted acoustic feedback "howls"; as with acoustic guitars, there are a number of types of electric guitars, including hollowbody guitars, archtop guitars and solid-body guitars, which are used in rock music.
The loud, amplified sound and sonic power of the electric guitar played through a guitar amp has played a key role in the development of blues and rock music, both as an accompaniment instrument and performing guitar solos, in many rock subgenres, notably heavy metal music and punk rock. The electric guitar has had a major influence on popular culture; the guitar is used in a wide variety of musical genres worldwide. It is recognized as a primary instrument in genres such as blues, country, folk, jota, metal, reggae, rock and many forms of pop. Before the development of the electric guitar and the use of synthetic materials, a guitar was defined as being an instrument having "a long, fretted neck, flat wooden soundboard, a flat back, most with incurved sides." The term is used to refer to a number of chordophones that were developed and used across Europe, beginning in the 12th century and in the Americas. A 3,300-year-old stone carving of a Hittite bard playing a stringed instrument is the oldest iconographic representation of a chordophone and clay plaques from Babylonia show people playing an instrument that has a strong resemblance to the guitar, indicating a possible Babylonian origin for the guitar.
The modern word guitar, its antecedents, has been applied to a wide variety of chordophones since classical times and as such causes confusion. The English word guitar, the German Gitarre, the French guitare were all adopted from the Spanish guitarra, which comes from the Andalusian Arabic قيثارة and the Latin cithara, which in turn came from the Ancient Greek κιθάρα. Which comes from the Persian word "sihtar"; this pattern of naming is visible in setar and sitar. The word "tar" at the end of all of these words is a Persian word that means "string". Many influences are cited as antecedents to the modern guitar. Although the development of the earliest "guitars" is lost in the history of medieval Spain, two instruments are cited as their most influential predecessors, the European lute and its cousin, the four-string oud. At least two instruments called "guitars" were in use in Spain by 1200: the guitarra latina and the so-called guitarra morisca; the guitarra morisca had a rounded back, wide fingerboard, several sound holes.
The guitarra Latina had a narrower neck. By the 14th century the qualifiers "moresca" or "morisca" and "latina" had been dropped, these two cordophones were referred to as guitars; the Spanish vihuela, called in Italian the "viola da mano", a guitar-like instrument of the 15th and 16th centuries, is considered to have been the single most important influence in the development of the baroque guitar. It had six courses, lute-like tuning in fourths and a guitar-like body, although early representations reveal an instrument with a cut waist, it was larger than the contemporary four-course guitars. By the 16th century, the vihuela's construction had more in common with the modern guitar, with its curved one-piece ribs, than with the viols, more like a larger version of the contemporary four-course guita