Disc jockey in the context of Audio console

Hip-hop (also known as rap music or simply rap) is a genre of popular music that emerged in the early 1970s alongside an associated subculture in the African-American and Latino communities of New York City. The musical style is characterized by the synthesis of a wide range of techniques, but rapping is frequent enough that it has become a defining characteristic. Other key markers of the genre are the disc jockey (DJ), turntablism, scratching, beatboxing, and instrumental tracks. Cultural interchange has always been central to the hip-hop genre; it simultaneously borrows from its social environment while commenting on it.

The hip-hop genre and culture emerged from block parties in ethnic minority neighborhoods of New York City, particularly the Bronx. DJs began expanding the instrumental breaks of popular records when they noticed how excited it would make the crowds. The extended breaks provided a platform for break dancers and rappers. These breakbeats enabled the subsequent evolution of the hip-hop style. Many of the records used were disco due to its popularity at the time. This disco-inflected music was originally known as disco-rap and later described as "old-school hip-hop".

Rapping (also dropping, rhyming, flowing, spitting, emceeing, or MCing) is an artistic form of vocal delivery and emotive expression that incorporates "rhyme, rhythmic speech, and [commonly] street vernacular". It is usually performed over a backing beat or musical accompaniment. The components of rap include "content" (what is being said, e.g., lyrics), "flow" (rhythm, rhyme), and "delivery" (cadence, tone). Rap differs from spoken-word poetry in that it is usually performed off-time to musical accompaniment. It also differs from singing, which varies in pitch and does not always include words. Because they do not rely on pitch inflection, some rap artists may play with timbre or other vocal qualities. Rap is a primary ingredient of hip-hop music, and so commonly associated with the genre that it is sometimes called "rap music".

Precursors to modern rap music include the West African griot tradition, certain vocal styles of blues and jazz, an African-American insult game called playing the dozens (see Battle rap and Diss), and 1960s African-American poetry. Stemming from the hip-hop cultural movement, rap music originated in the Bronx, New York City, in the early 1970s and became part of popular music later that decade. Rapping developed from the announcements made over the microphone at parties by DJs and MCs, evolving into more complex lyrical performances.

Hip-hop culture is an art movement that emerged in New York City, in the borough of The Bronx, primarily within the black community. Hip Hop as an art form and culture has been heavily influenced by both male and female artists. It is characterized by the key elements of rapping, DJing and turntablism, and breakdancing; other elements include graffiti, beatboxing, street entrepreneurship, hip hop language, and hip-hop fashion.Many cite hip-hop's emergence as beginning in August 1973 when brother–sister duo DJ Kool Herc and Cindy Campbell hosted the first documented indoor hip hop party and culture event in the Bronx; Helping to spark the rise of the genre. However many hiphop pioneers and historians contend that Hip Hop did not have just one founding father. The black Spades street gang and Disco King Mario of the Bronxdale Houses are also considered vital in the early origins of hip-hop culture and music. Disco King Mario hosted and organized outdoor hip-hop culture events, and park jams that predated DJ Kool Herc's 1973 indoor hip-hop party. DJ Kool Herc was also among the attendees at Disco King Mario's hip-hop events. Since then hip-hop culture has spread to both urban and suburban communities throughout the United States and subsequently the world. These elements were adapted and developed considerably, particularly as the art forms spread to new continents and merged with local styles in the 1990s and subsequent decades. Even as the movement continues to expand globally and explore myriad styles and art forms, including hip-hop theater and hip hop film, the four foundational elements provide coherence and a strong foundation for hip hop culture.

Hip hop is simultaneously a new and old phenomenon; the importance of sampling tracks, beats, and basslines from old records to the art form means that much of the culture has revolved around the idea of updating classic recordings, attitudes, and experiences for modern audiences. Sampling older culture and reusing it in a new context or a new format is called "flipping" in hip hop culture. Hip hop music follows in the footsteps of earlier African-American-rooted and Latino musical genres such as blues, jazz, rag-time, funk, salsa, and disco to become one of the most practiced genres worldwide.

A nightclub or dance club is a club that is open at night, usually for drinking, dancing and other entertainment. Nightclubs often have a bar and discotheque (usually simply known as disco) with a dance floor, laser lighting displays, and a stage for live music or a disc jockey (DJ) who mixes recorded music. Nightclubs tend to be smaller than live music venues like theatres and stadiums, with few or no seats for customers.

Nightclubs generally restrict access to people in terms of age, attire, personal belongings, and behaviors. Nightclubs typically have dress codes to prohibit people wearing informal, indecent, offensive, gym, or gang-related attire from entering. Unlike other entertainment venues, nightclubs are more likely to use bouncers to screen prospective patrons for entry.

Contemporary hit radio (CHR, also known as contemporary hits, hit list, current hits, hit music, top 40, or pop radio) is a radio format common in many countries that focuses on playing current and recurrent popular music as determined by the Top 40 music charts. There are several subcategories, dominantly focusing on rock, pop, or urban music. Used alone, CHR most often refers to the CHR-pop format. The term contemporary hit radio was coined in the early 1980s by Radio & Records magazine to designate Top 40 stations which continued to play hits from all musical genres as pop music splintered into adult contemporary, urban contemporary, contemporary Christian and other formats.

The term "top 40" is also used to refer to the actual list of hit songs, and, by extension, to refer to pop music in general. The term has also been modified to describe top 50; top 30; top 20; top 10; hot 100 (each with its number of songs) and hot hits radio formats, but carrying more or less the same meaning and having the same creative point of origin with Todd Storz as further refined by Gordon McLendon as well as Bill Drake. The format became especially popular in the mid-sixties as radio stations constrained disc jockeys to numbered play lists in the wake of the payola scandal.

A magnetic cartridge, more commonly called a phonograph cartridge or phono cartridge or (colloquially) a pickup, is an electromechanical transducer that is used to play phonograph records on a turntable.

The cartridge contains a removable or permanently mounted stylus, the tip - usually a gemstone, such as diamond or sapphire - which makes physical contact with the record's groove. In popular usage and in disc jockey jargon, the stylus, and sometimes the entire cartridge, is often called the needle. As the stylus tracks the serrated groove, it vibrates a cantilever on which is mounted a permanent magnet which moves between the magnetic fields of sets of electromagnetic coils in the cartridge (or vice versa: the coils are mounted on the cantilever, and the magnets are in the cartridge). The shifting magnetic fields generate an electrical current in the coils. The electrical signal generated by the cartridge can be amplified and then converted into sound by a loudspeaker.

A music venue is any location used for a concert or musical performance. Music venues range in size and location, from a small coffeehouse for folk music shows, an outdoor bandshell or bandstand or a concert hall to an indoor sports stadium. Typically, different types of venues host different genres of music. Opera houses, bandshells, and concert halls host classical music performances, whereas public houses ("pubs"), nightclubs, and discothèques offer music in contemporary genres, such as rock, dance, country, and pop.

Music venues may be either privately or publicly funded, and may charge for admission. An example of a publicly funded music venue is a bandstand in a municipal park; such outdoor venues typically do not charge for admission. A nightclub is a privately funded venue operated as a profit-making business; venues like these typically charge an entry fee to generate a profit. Music venues do not necessarily host live acts; disc jockeys at a discothèque or nightclub play recorded music through a PA system.

Disco King Mario (July 1, 1956 – May 21, 1994) was a prominent Black American DJ and pioneer of hip-hop culture. He is known for being one of the founding fathers of hip-hop. His outdoor parties and park jams made him well known in and around the Bronxdale housing projects, and he was also a member of the Black Spades. Mario's family hailed from Edenton, North Carolina, the place of his birth.

Lance Taylor (born April 17, 1957), also known as Afrika Bambaataa (/ˌæfrɪkə bæmˈbɑːtə/), is a retired American DJ, rapper, and record producer. He is notable for releasing a series of genre-defining electro tracks in the 1980s that influenced the development of hip hop culture. Afrika Bambaataa is one of the originators of breakbeat DJing.

Through his co-opting of his street gang Black Spades into the music and culture-oriented organization Universal Zulu Nation, he has helped spread hip hop culture throughout the world.In May 2016, Bambaataa left his position as head of the Universal Zulu Nation due to multiple allegations of child sexual abuse dating as far back as the 1970s.

House dance is a freestyle street dance and social dance that has roots in the underground house music scene of Chicago and New York. It is typically danced to loud and bass-heavy electronic dance music provided by DJs in nightclubs or at raves.

House music, or simply house, is a genre of electronic dance music characterized by a repetitive four-on-the-floor beat and a typical tempo of 115–130 beats per minute. It was created by DJs and music producers from Chicago's underground club culture and evolved slowly in the early/mid 1980s as DJs began altering disco songs to give them a more mechanical beat. By early 1988, house became mainstream and supplanted the typical '80s music beat.

House was created and pioneered by DJs and producers in Chicago such as Frankie Knuckles, Ron Hardy, Jesse Saunders, Chip E., Joe Smooth, Steve "Silk" Hurley, Farley "Jackmaster" Funk, Marshall Jefferson, Phuture, and others. House music initially expanded to New York City, then internationally to cities such as London, and ultimately became a worldwide phenomenon.

Peter O. Phillips (born June 21, 1970), better known by his stage name Pete Rock, is an American record producer, DJ, and rapper. He rose to prominence in the early 1990s as one half of the group Pete Rock & CL Smooth. Early on in his career, he was also famed for his remix work.

After the duo went their separate ways, Rock continued with a solo career that has garnered him worldwide respect, though little in the way of mainstream success. Along with groups such as Stetsasonic, Gang Starr, A Tribe Called Quest and The Roots, Rock played a major role in the merging of elements from jazz into hip hop music (also known as jazz rap). Pete Rock is also the older brother and younger cousin, respectively, of rappers Grap Luva and Heavy D.

A CDJ is a specialized digital music player for DJing. Originally designed to play music from compact discs, many CDJs can play digital music files stored on USB flash drives or SD cards. In typical use, at least two CDJs are plugged into a DJ mixer. CDJs have jog wheels and pitch faders that allow manipulation of the digital music similar to a vinyl record on a DJ turntable. Many have additional features that are not present on turntables, such as looping, beat analysis, and adjusting tempo independently of pitch. Additionally, some can function as DJ controllers to control the playback of digital files in DJ software such as VirtualDJ and Serato.

Many pro audio companies such as Gemini, Denon DJ, Numark, Stanton, and Vestax produced DJ quality CD players. In 1993 Denon DJ was the first to implement a 2-piece rack-mounted dual-deck variable-pitch CD player with a jog wheel and instant cue button for DJs. It quickly became the industry standard and was widely adopted in most clubs and mobile DJs throughout the 90s up until 2004 when Pioneer made an impact with the CDJ-1000. Pioneer DJ CDJs have since become widely regarded as the industry standard.