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A disc jockey, more commonly abbreviated as DJ, is a person who plays recorded music for an audience. Types of DJs include radio DJs (who host programs on
music radio Music radio is a radio format in which music is the main broadcast content. After television replaced old time radio's dramatic content, music formats became dominant in many countries. Radio drama and comedy continue, often on public radio. M ...
stations), club DJs (who work at a
nightclub A nightclub (music club, discothèque, disco club, or simply club) is an entertainment venue during nighttime comprising a dance floor, lightshow, and a stage for live music or a disc jockey (DJ) who plays recorded music. Nightclubs gener ...
or music festival),
mobile DJs Mobile disc jockeys (also known as mobile DJs or mobile discos) are disc jockeys that tour with portable sound, lighting, and video systems. They play music for a targeted audience from a collection of pre-recorded music using vinyl records, cas ...
(who are hired to work at public and private events such as weddings, parties, or festivals), and turntablists (who use record players, usually
turntable A phonograph, in its later forms also called a gramophone (as a trademark since 1887, as a generic name in the UK since 1910) or since the 1940s called a record player, or more recently a turntable, is a device for the mechanical and analogu ...
s, to manipulate sounds on phonograph records). Originally, the "disc" in "disc jockey" referred to shellac and later vinyl records, but nowadays DJ is used as an all-encompassing term to also describe persons who mix music from other recording media such as cassettes, CDs or
digital audio file An audio file format is a file format for storing digital audio data on a computer system. The bit layout of the audio data (excluding metadata) is called the audio coding format and can be uncompressed, or compressed to reduce the file size, ofte ...
s on a
CDJ 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 ...
, controller, or even a laptop. DJs may adopt the title "DJ" in front of their real names, adopted pseudonyms, or stage names. DJs commonly use audio equipment that can play at least two sources of recorded music simultaneously. This enables them to blend tracks together to create transitions between recordings and develop unique mixes of songs. This can involve aligning the beats of the music sources so their rhythms and tempos do not clash when played together and enable a smooth transition from one song to another. DJs often use specialized
DJ mixer A DJ mixer is a type of audio mixing console used by disc jockeys (DJs) to control and manipulate multiple audio signals. Some DJs use the mixer to make seamless transitions from one song to another when they are playing records at a dance clu ...
s, small audio mixers with crossfader and cue functions to blend or transition from one song to another. Mixers are also used to pre-listen to sources of recorded music in headphones and adjust upcoming tracks to mix with currently playing music. DJ software can be used with a
DJ controller DJ controllers are devices used to help DJs mix music with DJ software using knobs, encoders, jog wheels, faders, backlit buttons, touch strips, and other components. Overview DJ controllers are microprocessor-based control surfaces used to pro ...
device to mix audio files on a computer instead of a console mixer. DJs may also use a
microphone A microphone, colloquially called a mic or mike (), is a transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones, hearing aids, public address systems for concert halls and publ ...
to speak to the audience;
effects unit An effects unit or effects pedal is an electronic device that alters the sound of a musical instrument or other audio source through audio signal processing. Common effects include distortion/overdrive, often used with electric guitar in el ...
s such as
reverb Reverberation (also known as reverb), in acoustics, is a persistence of sound, after a sound is produced. Reverberation is created when a sound or signal is reflected causing numerous reflections to build up and then decay as the sound is abs ...
to create sound effects and electronic musical instruments such as drum machines and synthesizers.


Etymology

The term "disc jockey" was ostensibly coined by radio gossip commentator
Walter Winchell Walter Winchell (April 7, 1897 – February 20, 1972) was a syndicated American newspaper gossip columnist and radio news commentator. Originally a vaudeville performer, Winchell began his newspaper career as a Broadway reporter, critic and co ...
in 1935, and the phrase first appeared in print in a 1941 ''
Variety Variety may refer to: Arts and entertainment Entertainment formats * Variety (radio) * Variety show, in theater and television Films * ''Variety'' (1925 film), a German silent film directed by Ewald Andre Dupont * ''Variety'' (1935 film), ...
'' magazine. Originally, the word "disc" in "disc jockey" referred to phonograph or gramophone records and was used to describe radio personalities who introduced them on the air.


Role

"DJ" is used as an all-encompassing term to describe someone who mixes recorded music from any source, including
vinyl records A phonograph record (also known as a gramophone record, especially in British English), or simply a record, is an analog sound storage medium in the form of a flat disc with an inscribed, modulated spiral groove. The groove usually starts near ...
, cassettes, CDs, or
digital audio file An audio file format is a file format for storing digital audio data on a computer system. The bit layout of the audio data (excluding metadata) is called the audio coding format and can be uncompressed, or compressed to reduce the file size, ofte ...
s stored on
USB stick A USB flash drive (also called a thumb drive) is a data storage device that includes flash memory with an integrated USB interface. It is typically removable, rewritable and much smaller than an optical disc. Most weigh less than . Since first ...
or laptop. DJs typically perform for a live audience in a
nightclub A nightclub (music club, discothèque, disco club, or simply club) is an entertainment venue during nighttime comprising a dance floor, lightshow, and a stage for live music or a disc jockey (DJ) who plays recorded music. Nightclubs gener ...
or dance club or a TV, radio broadcast audience, or an online radio audience. DJs also create mixes, remixes and tracks that are recorded for later sale and distribution. In hip hop music, DJs may create beats, using percussion
break Break or Breaks or The Break may refer to: Time off from duties * Recess (break), time in which a group of people is temporarily dismissed from its duties * Break (work), time off during a shift/recess ** Coffee break, a short mid-morning res ...
s, basslines and other musical content
sampled Sample or samples may refer to: Base meaning * Sample (statistics), a subset of a population – complete data set * Sample (signal), a digital discrete sample of a continuous analog signal * Sample (material), a specimen or small quantity of so ...
from pre-existing records. In hip hop, rappers and MCs use these beats to
rap Rapping (also rhyming, spitting, emceeing or MCing) is a musical form of vocal delivery that incorporates "rhyme, rhythmic speech, and street vernacular". It is performed or chanted, usually over a backing beat or musical accompaniment. The ...
over. Some DJs adopt the title "DJ" as part of their names (e.g.,
DJ Jazzy Jeff Jeffrey Allen Townes (born January 22, 1965), known professionally as DJ Jazzy Jeff (or simply Jazz), is an American disc jockey (DJ) and music producer. He was a member of DJ Jazzy Jeff & the Fresh Prince with Will Smith. He is credited, alo ...
,
DJ Qbert Richard Quitevis (born October 7, 1969) known by his stage name DJ Qbert or Qbert, is an American turntablist and composer. He was awarded America's Best DJ in 2010, was DMC USA Champion 1991 (solo) and achieved titles as DMC World Champion in ...
,
DJ Shadow Joshua Paul Davis (born June 29, 1972), better known by his stage name DJ Shadow, is an American DJ, songwriter and record producer. His debut studio album, '' Endtroducing.....'' was released in 1996. Biography Early years (1989–1995) DJ Sh ...
and
DJ Yoda Duncan Beiny (born 1977 in London, England), better known as DJ Yoda, is a hip hop turntablist who uses samples to create an animated musical style. He is known for several awards and media industry achievements. Early life and career Aft ...
). Professional DJs often specialize in a specific genre of music, such as
techno Techno is a Music genre, genre of electronic dance music (EDM) which is generally music production, produced for use in a continuous DJ set, with tempo often varying between 120 and 150 beats per minute (bpm). The central Drum beat, rhythm is typ ...
, house or hip hop music. DJs typically have extensive knowledge about the music they specialize in. Many DJs are avid music collectors of vintage, rare or obscure tracks and records.


Types


Club DJs

Club DJs, commonly referred to as DJs in general, play music at musical events, such as parties at
music venues 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. ...
or bars, clubs, music festivals, corporate and private events. Typically, club DJs mix music recordings from two or more sources using different mixing techniques to produce a non-stopping flow of music. One key technique used for seamlessly transitioning from one song to another is beatmatching. A DJ who mostly plays and mixes one specific music genre is often given the title of that genre; for example, a DJ who plays hip hop music is called a hip hop DJ, a DJ who plays house music is a house DJ, a DJ who plays
techno Techno is a Music genre, genre of electronic dance music (EDM) which is generally music production, produced for use in a continuous DJ set, with tempo often varying between 120 and 150 beats per minute (bpm). The central Drum beat, rhythm is typ ...
is called a techno DJ, and so on. The quality of a DJ performance (often called a DJ mix or DJ set) consists of two main features: technical skills, or how well the DJ can operate the equipment and produce smooth transitions between two or more recordings and a playlist; and the ability of a DJ to select the most suitable recordings, also known as "reading the crowd".


Hip hop DJs

DJ Kool Herc Clive Campbell (born April 16, 1955), better known by his stage name DJ Kool Herc, is a Jamaican-American DJ who is credited with contributing to the development of hip hop music in the Bronx, New York City, in the 1970s through his "Back to ...
, Grandmaster Flash, and Afrika Bambaataa were members of a block party at South Bronx. Kool Herc played records such as James Brown's "
Give It Up or Turnit a Loose "Give It Up or Turnit a Loose" is a funk song recorded by James Brown. Released as a single in 1969, the song was a #1 R&B hit and also made the top 20 pop singles chart. "Give It Up or Turnit a Loose" appeared as an instrumental on the ''Ain't ...
", Jimmy Castor's "
It's Just Begun ''It's Just Begun'' is the second album by the Jimmy Castor Bunch, released in 1972 on RCA Records.''It's Just Begun at Allmusic/ref> " It's Just Begun" and "Troglodyte (Cave Man)" have each become staples in hip-hop sampling. Songs from the albu ...
", Booker T. & the M.G.'s' " Melting Pot", Incredible Bongo Band's "
Bongo Rock "Bongo Rock" is a rock and roll instrumental written and recorded by Preston Epps. Released as a single in 1959, it charted #14 Pop in the United States and #4 in Canada. In 1973 the Incredible Bongo Band recorded a cover version of "Bongo Roc ...
" and " Apache", and UK rock band Babe Ruth's "
The Mexican ''The Mexican'' is a 2001 American dark comedy adventure crime film directed by Gore Verbinski and stars Julia Roberts and Brad Pitt in lead roles. Its plot is a mixture of different genres. Plot In Los Angeles, a traffic light changes to r ...
". With Bronx clubs struggling with street gangs, uptown DJs catering to an older disco crowd with different aspirations, and commercial radio also catering to a demographic distinct from teenagers in the Bronx, Herc's parties had a ready-made audience. DJ Kool Herc developed the style that was the blueprint for hip hop music. Herc used the record to focus on a short, heavily percussive part in it: the "
break Break or Breaks or The Break may refer to: Time off from duties * Recess (break), time in which a group of people is temporarily dismissed from its duties * Break (work), time off during a shift/recess ** Coffee break, a short mid-morning res ...
". Since this part of the record was the one the dancers liked best, Herc isolated the break and prolonged it by changing between two record players. As one record reached the end of the break, he cued a second record back to the beginning of the break, which allowed him to extend a relatively short section of music into a "five-minute loop of fury". This innovation had its roots in what Herc called "The Merry-Go-Round", a technique by which the DJ switched from break to break at the height of the party. This technique is specifically called "The Merry-Go-Round" because according to Herc, it takes one "back and forth with no slack."


Radio DJs

Radio DJs or radio personalities introduce and play music broadcasts on AM, FM, digital or
Internet radio Online radio (also web radio, net radio, streaming radio, e-radio, IP radio, Internet radio) is a digital audio service transmitted via the Internet. Broadcasting on the Internet is usually referred to as webcasting since it is not transmitted ...
stations.


Dancehall/reggae deejays

In
Jamaican music The music of Jamaica includes Jamaican folk music and many popular genres, such as mento, ska, rocksteady, reggae, dub music, dancehall, reggae fusion and related styles. Reggae is especially popular through the international fame of Bob Marley. ...
, a deejay (DJ) is a
reggae Reggae () is a music genre that originated in Jamaica in the late 1960s. The term also denotes the modern popular music of Jamaica and its diaspora. A 1968 single by Toots and the Maytals, " Do the Reggay" was the first popular song to use ...
or dancehall musician who sings and " toasts" (raps) to an instrumental
riddim Riddim is the Jamaican Patois pronunciation of the English word "rhythm". In the context of reggae and dancehall, it refers to the instrumental accompaniment to a song and is synonymous with the rhythm section. Jamaican music genres that use the ...
. Deejays are not to be confused with DJs from other music genres like hip hop, where they select and play music. Dancehall/reggae DJs who select
riddim Riddim is the Jamaican Patois pronunciation of the English word "rhythm". In the context of reggae and dancehall, it refers to the instrumental accompaniment to a song and is synonymous with the rhythm section. Jamaican music genres that use the ...
s to play are called selectors. Deejays whose style is nearer to singing are sometimes called
singjay Singjaying is a Jamaican style of reggae vocals combining toasting and singing in an elastic format that encourages rhythmically compelling and texturally impressive vocal embellishments. The performer is called a singjay, a combination of singer ...
s. The term deejay originated in the 1960s and 1970s when performers such as
U-Roy Ewart Beckford OD (21 September 1942 – 17 February 2021), known by the stage name U-Roy, was a Jamaican vocalist and pioneer of toasting.Jo-Ann GreeneU-Roy Biography, AllMusic. Retrieved 11 April 2013. U-Roy was known for a melodic style ...
or
King Stitt Winston Sparkes (17 September 1940 – 31 January 2012), better known as King Stitt, was a Jamaican pioneer DJ. Biography He earned the nickname as a boy because of his stuttering and decided to use it as his stage name. Stitt began deejaying ...
toasted over the instrumental ( dub music) versions of popular records. These versions were often released on the flip side to the song's
45 record In music, a single is a type of release, typically a song recording of fewer tracks than an LP record or an album. One can be released for sale to the public in a variety of formats. In most cases, a single is a song that is released separate ...
. This gave the deejays the chance to create on-the-fly lyrics to the music. Big Youth, and
I-Roy Roy Samuel Reid (28 June 1942 – 27 November 1999), better known as I-Roy, was a Jamaican deejay who had a very prolific career during the 1970s. Biography Born in 1944 in Saint Thomas Parish, Jamaica, Reid graduated from Dinthill Technical C ...
were famous deejays in Jamaica.


Turntablists

Turntablists, also called battle DJs, use
turntables A phonograph, in its later forms also called a gramophone (as a trademark since 1887, as a generic name in the UK since 1910) or since the 1940s called a record player, or more recently a turntable, is a device for the mechanical and analogu ...
and
DJ mixer A DJ mixer is a type of audio mixing console used by disc jockeys (DJs) to control and manipulate multiple audio signals. Some DJs use the mixer to make seamless transitions from one song to another when they are playing records at a dance clu ...
to manipulate recorded sounds to produce new music. In essence, they use DJ equipment as a musical instrument. Perhaps the best-known turntablist technique is
scratching Scratching, sometimes referred to as scrubbing, is a DJ and turntablist technique of moving a vinyl record back and forth on a turntable to produce percussive or rhythmic sounds. A crossfader on a DJ mixer may be used to fade between two record ...
. Turntablists often participate in DJ contests like
DMC World DJ Championships DMC World DJ Championships is an annual DJ competition hosted by Disco Mix Club (DMC) which began in 1985. Championships were sponsored internationally by Technics, but in 2010 Technics has been replaced by Serato and Rane. From 2011, the viny ...
and Red Bull 3Style.


Residents

A resident DJ performs at a venue on a regular basis or permanently. They would perform regularly (typically under an agreement) in a particular discotheque, a particular club, a particular event, or a particular broadcasting station. Residents have a decisive influence on the club or a series of events. Per agreement with the management or company, the DJ would have to perform under agreed times and dates. Typically, DJs perform as residents for two or three times in a week, for example, on Friday and Saturday. DJs who make a steady income from a venue are also considered resident DJs. Examples for resident DJs are: * Alfredo Fiorito,
Richie Hawtin Richard "Richie" Hawtin (born June 4, 1970) is a British-Canadian electronic musician and DJ. He became involved with Detroit techno's second wave in the early 1990s, and has been a leading exponent of minimal techno since the mid-1990s. He beca ...
,
Sven Väth Sven Väth (born 26 October 1964) is a German DJ and electronic music producer. He is a three-time DJ Awards winner, and his career in electronic music spans over 30 years. The single " Electrica Salsa" with OFF launched his career in 1986. Refe ...
Amnesia, Ibiza, Spain *
Martin Garrix Martijn Gerard Garritsen (; born 14 May 1996), known professionally as Martin Garrix and also as Ytram and GRX, is a Dutch disc jockey and music producer who was ranked number one on ''DJ Mag''s Top 100 DJs list for three consecutive years—201 ...
Hï Ibiza, Ibiza, Spain *
Larry Levan Larry Levan (; born Lawrence Philpot, July 20, 1954 – November 8, 1992) was an American DJ best known for his decade-long residency at the New York City night club Paradise Garage, which has been described as the prototype of the modern da ...
Paradise Garage Paradise Garage, also known as "the Garage" or the "Gay-rage", was a New York City discotheque notable in the history of dance and pop music, as well as LGBT and nightclub cultures. The club was founded by sole proprietor Michael Brody, and ...
, New York City, USA * David Mancuso
The Loft The Loft may refer to: Arts, entertainment, and media * The Loft (British band), a British indie band * The Loft (Danish band), a Danish band * ''The Loft'' (film) (2014) an American film * The Loft (Sirius XM), a music channel on satellite r ...
, New York City *
Tiësto Tijs Michiel Verwest (; born 17 January 1969), known professionally as Tiësto ( ), is a Dutch DJ and music producer from Breda. He was voted "the Greatest DJ of All Time" by '' Mix'' magazine in a 2010/2011 poll amongst fans. In 2013, he was v ...
,
Deadmau5 Joel Thomas Zimmerman (born January 5, 1981), known professionally as Deadmau5 (stylized as deadmau5; pronounced "dead-mouse"), is a Canadian electronic music producer and DJ. He mainly produces progressive house music, though he also produce ...
, Calvin HarrisHakkasan,
Las Vegas Las Vegas (; Spanish for "The Meadows"), often known simply as Vegas, is the 25th-most populous city in the United States, the most populous city in the state of Nevada, and the county seat of Clark County. The city anchors the Las Vegas ...
, USA *
Kaskade Ryan Gary Raddon (born February 25, 1971), better known by his stage name Kaskade, is an American DJ, record producer and remixer. ''DJ Times'' voted Kaskade "America's Best DJ" in 2011 and 2013. ''DJ Mag'' named Kaskade fifty-first on its 20 ...
— Encore Beach Club, Las Vegas, USA * Ben Klock, Marcel Dettmann, Tama Sumo
Berghain Berghain () is a nightclub in Berlin, Germany. It is named after its location near the border between Kreuzberg and Friedrichshain in Berlin, and is a short walk from Berlin Ostbahnhof main line railway station.
, Berlin, Germany *
Fish Go Deep Fish Go Deep are an Irish production duo consisting of Greg Dowling and Shane Johnson from Cork city.
— Cork, Ireland *
Djsky Ghareeb Kaawar, known professionally as Djsky, is a Lebanese electronic music DJ, music programmer, remixer and event organiser based in Ghana, United States and Lebanon. In an interview with Watsup TV, Djsky revealed he was the first to intr ...
— Ghana, West Africa


Other types

*
Mobile DJ Mobile disc jockeys (also known as mobile DJs or mobile discos) are disc jockeys that tour with portable sound, lighting, and video systems. They play music for a targeted audience from a collection of pre-recorded music using vinyl records, cas ...
s — DJs with their own portable audio sound systems who specialize in performing at gatherings such as block parties, street fairs, taverns, weddings, birthdays, school and corporate events. Mobile DJs may also offer lighting packages and video systems. * DJanes — a term describing female DJs used in countries such as Germany that employ
grammatical gender In linguistics, grammatical gender system is a specific form of noun class system, where nouns are assigned with gender categories that are often not related to their real-world qualities. In languages with grammatical gender, most or all noun ...
in their languages. * Celebrity DJs — widely known
celebrities Celebrity is a condition of fame and broad public recognition of a person or group as a result of the attention given to them by mass media. An individual may attain a celebrity status from having great wealth, their participation in sports ...
performing as DJs.


Equipment

DJs use equipment that enables them to play multiple sources of recorded music and mix them to create seamless transitions and unique arrangements of songs. An important tool for DJs is the specialized
DJ mixer A DJ mixer is a type of audio mixing console used by disc jockeys (DJs) to control and manipulate multiple audio signals. Some DJs use the mixer to make seamless transitions from one song to another when they are playing records at a dance clu ...
, a small
audio mixer Audio most commonly refers to sound, as it is transmitted in signal form. It may also refer to: Sound *Audio signal, an electrical representation of sound *Audio frequency, a frequency in the audio spectrum *Digital audio, representation of sound ...
with a crossfader and cue functions. The crossfader enables the DJ to blend or transition from one song to another. The cue knobs or switches allow the DJ to "listen" to a source of recorded music in headphones before playing it for the live club or broadcast audience. Previewing the music in headphones helps the DJ pick the next track they want to play, cue up the track to the desired starting location, and align the two tracks' beats in traditional situations where auto sync technology is not being used. This process ensures that the selected song will mix well with the currently playing music. DJs may align the beats of the music sources so their rhythms do not clash when they are played together to help create a smooth transition from one song to another. Other equipment may include a
microphone A microphone, colloquially called a mic or mike (), is a transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones, hearing aids, public address systems for concert halls and publ ...
,
effects unit An effects unit or effects pedal is an electronic device that alters the sound of a musical instrument or other audio source through audio signal processing. Common effects include distortion/overdrive, often used with electric guitar in el ...
s such as
reverb Reverberation (also known as reverb), in acoustics, is a persistence of sound, after a sound is produced. Reverberation is created when a sound or signal is reflected causing numerous reflections to build up and then decay as the sound is abs ...
, and electronic musical instruments such as drum machines and synthesizers. As music technology has progressed, DJs have adopted different types of equipment to play and mix music, all of which are still commonly used. Traditionally, DJs used two
turntable A phonograph, in its later forms also called a gramophone (as a trademark since 1887, as a generic name in the UK since 1910) or since the 1940s called a record player, or more recently a turntable, is a device for the mechanical and analogu ...
s plugged into a
DJ mixer A DJ mixer is a type of audio mixing console used by disc jockeys (DJs) to control and manipulate multiple audio signals. Some DJs use the mixer to make seamless transitions from one song to another when they are playing records at a dance clu ...
to mix music on vinyl records. As compact discs became popular media for publishing music, specialized high-quality CD players known as
CDJ 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 ...
s were developed for DJs. CDJs can take the place of turntables or be used together with turntables. Many CDJs can now play digital music files from
USB flash drive Universal Serial Bus (USB) is an industry standard that establishes specifications for cables, connectors and protocols for connection, communication and power supply ( interfacing) between computers, peripherals and other computers. A bro ...
s or SD cards in addition to CDs. With the spread of portable laptops, tablets, and
smartphone A smartphone is a portable computer device that combines mobile telephone and computing functions into one unit. They are distinguished from feature phones by their stronger hardware capabilities and extensive mobile operating systems, whic ...
computers, DJs began using software together with specialized
sound card A sound card (also known as an audio card) is an internal expansion card that provides input and output of audio signals to and from a computer under the control of computer programs. The term ''sound card'' is also applied to external audio ...
s and
DJ controller DJ controllers are devices used to help DJs mix music with DJ software using knobs, encoders, jog wheels, faders, backlit buttons, touch strips, and other components. Overview DJ controllers are microprocessor-based control surfaces used to pro ...
hardware. DJ software can be used in conjunction with a hardware DJ mixer or be used instead of a hardware mixer.


Turntables

Turntable A phonograph, in its later forms also called a gramophone (as a trademark since 1887, as a generic name in the UK since 1910) or since the 1940s called a record player, or more recently a turntable, is a device for the mechanical and analogu ...
s allow DJs to play vinyl records. By adjusting the playback speed of the turntable, either by adjusting the speed knob or by manipulating the platter (e.g., by slowing down the platter by putting a finger gently along the side), DJs can match the
tempo In musical terminology, tempo ( Italian, 'time'; plural ''tempos'', or ''tempi'' from the Italian plural) is the speed or pace of a given piece. In classical music, tempo is typically indicated with an instruction at the start of a piece (ofte ...
s of different records so their rhythms can be played together at the same time without clashing or make a smooth, seamless transition from one song to another. This technique is known as beatmatching. DJs typically replace the rubber mat on turntables that keep the record moving in sync with the turntable with a
slipmat A slipmat is a circular piece of slippery cloth or synthetic materials disk jockeys place on the turntable platter instead of the traditional rubber mat. Unlike the rubber mat which is made to hold the record firmly in sync with the rotating pl ...
that facilitates manipulating the playback of the record by hand. With the slipmat, the DJ can stop or slow down the record while the turntable is still spinning.
Direct-drive turntable A direct-drive turntable is one of the three main phonograph designs currently being produced. The other styles are the belt-drive turntable and the idler-wheel type. Each name is based upon the type of coupling used between the platter of the ...
s are the type preferred by DJs. Belt-drive turntables are less expensive, but they are not suitable for turntablism and DJing, because the belt-drive motor can be damaged by this type of manipulation. Some DJs, most commonly those who play hip hop music, go beyond merely mixing records and use turntables as musical instruments for
scratching Scratching, sometimes referred to as scrubbing, is a DJ and turntablist technique of moving a vinyl record back and forth on a turntable to produce percussive or rhythmic sounds. A crossfader on a DJ mixer may be used to fade between two record ...
,
beat juggling Beat juggling is a deejaying and turntablism technique in which two records are used to prolong an existing beat, or to create a new one. It is associated with the context of hip hop, but not necessarily limited to this genre. Definition Beat j ...
, and other
turntablism Turntablism is the art of manipulating sounds and creating new music, sound effects, mixes and other creative sounds and beats, typically by using two or more turntables and a cross fader-equipped DJ mixer. The mixer is plugged into a PA sys ...
techniques.


CDJs/media players

CDJ 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 ...
s / media players are high-quality digital media players made for DJing. They often have large jog wheels and
pitch control A variable speed pitch control (or vari-speed) is a control on an audio device such as a turntable, tape recorder, or CD player that allows the operator to deviate from a standard speed (such as 33, 45 or even 78 rpm on a turntable), resulting ...
s to allow DJs to manipulate the playback of digital files for beatmatching similar to how DJs manipulate vinyl records on turntables. CDJs often have features such as loops and waveform displays similar to DJ software. Originally designed to play music from compact discs, they now can play digital music files stored on
USB flash drive Universal Serial Bus (USB) is an industry standard that establishes specifications for cables, connectors and protocols for connection, communication and power supply ( interfacing) between computers, peripherals and other computers. A bro ...
s and
SD card Secure Digital, officially abbreviated as SD, is a proprietary non-volatile flash memory card format developed by the SD Association (SDA) for use in portable devices. The standard was introduced in August 1999 by joint efforts between SanDis ...
s. Some CDJs can also connect to a computer running DJ software to act as a
DJ controller DJ controllers are devices used to help DJs mix music with DJ software using knobs, encoders, jog wheels, faders, backlit buttons, touch strips, and other components. Overview DJ controllers are microprocessor-based control surfaces used to pro ...
. Modern media players have the ability to stream music from online music providers such as Beatport, Beatsource, Tidal and Soundcloud GO.


DJ mixers

DJ mixers are small audio
mixing console A mixing console or mixing desk is an electronic device for Audio mixing (recorded music), mixing audio signals, used in sound recording and reproduction and sound reinforcement systems. Inputs to the console include microphones, signals fro ...
s specialized for DJing. Most DJ mixers have far fewer channels than a mixer used by a record producer or audio engineer; whereas standard live sound mixers in small venues have 12 to 24 channels, and standard recording studio mixers have even more (as many as 72 on large boards), basic DJ mixers may have only two channels. While DJ mixers have many of the same features found on larger mixers (faders, equalization knobs, gain knobs,
effects unit An effects unit or effects pedal is an electronic device that alters the sound of a musical instrument or other audio source through audio signal processing. Common effects include distortion/overdrive, often used with electric guitar in el ...
s, etc.), DJ mixers have a feature that is usually only found on DJ mixers: the crossfader. The crossfader is a type of fader that is mounted horizontally. DJs used the crossfader to mix two or more sound sources. The midpoint of the crossfader's travel is a 50/50 mix of the two channels (on a two-channel mixer). The far left side of the crossfader provides only the channel A sound source. The far right side provides only the channel B sound source (e.g., record player number 2). Positions in between the two extremes provide different mixes of the two channels. Some DJs use a computer with DJ software and a
DJ controller DJ controllers are devices used to help DJs mix music with DJ software using knobs, encoders, jog wheels, faders, backlit buttons, touch strips, and other components. Overview DJ controllers are microprocessor-based control surfaces used to pro ...
instead of an analog DJ mixer to mix music, although DJ software can be used in conjunction with a hardware DJ mixer.


Headphones

DJs generally use higher-quality headphones than those designed for music consumers. DJ headphones have other properties useful for DJs, such as designs that acoustically isolate the sounds of the headphones from the outside environment (hard shell headphones), flexible headbands and pivot joints to allow DJs to listen to one side of the headphones while turning the other headphone away (so they can monitor the mix in the club), and replaceable cables. Replaceable cables enable DJs to buy new cables if a cable becomes frayed, worn, or damaged, or if a cable is accidentally cut. Closed-back headphones are highly recommended for DJs to block outside noise as the environment of DJ usually tends to be very noisy. Standard headphones have a 3.5mm jack but DJ equipment usually requires ¼ inch jack. Most specialized DJ Headphones have an adapter to switch between a 3.5mm jack and ¼ inch jack. Detachable coiled cables are perfect for DJ Headphones.


Software

DJs have changed their equipment as new technologies are introduced. The earliest DJs in pop music, in 1970s discos, used
record turntable A phonograph, in its later forms also called a gramophone (as a trademark since 1887, as a generic name in the UK since 1910) or since the 1940s called a record player, or more recently a turntable, is a device for the mechanical and analogu ...
s, vinyl records and
audio console A mixing console or mixing desk is an electronic device for mixing audio signals, used in sound recording and reproduction and sound reinforcement systems. Inputs to the console include microphones, signals from electric or electronic instr ...
s. In the 1970s, DJs would have to lug heavy direct-drive turntables and crates of records to clubs and shows. In the 1980s, many DJs transitioned to compact cassettes. In the 1990s and 2000s, many DJs switched to using digital audio such as CDs and
MP3 MP3 (formally MPEG-1 Audio Layer III or MPEG-2 Audio Layer III) is a coding format for digital audio developed largely by the Fraunhofer Society in Germany, with support from other digital scientists in the United States and elsewhere. Origin ...
files. As technological advances made it practical to store large collections of digital music files on a laptop computer, DJ software was developed so DJs could use a laptop as a source of music instead of transporting CDs or vinyl records to gigs. Unlike most music player software designed for regular consumers, DJ software can play at least two audio files simultaneously, display the
waveform In electronics, acoustics, and related fields, the waveform of a signal is the shape of its graph as a function of time, independent of its time and magnitude scales and of any displacement in time.David Crecraft, David Gorham, ''Electro ...
s of the files on screen and enable the DJ to listen to either source. The waveforms allow the DJ to see what is coming next in the music and how the playback of different files is aligned. The software analyzes music files to identify their tempo and where the beats are. The analyzed information can be used by the DJ to help manually
beatmatch Beatmatching or pitch cue is a disc jockey technique of pitch shifting or timestretching an upcoming track to match its tempo to that of the currently playing track, and to adjust them such that the beats (and, usually, the bars) are synchroni ...
like with vinyl records or the software can automatically synchronize the beats. Digital signal processing algorithms in software allow DJs to adjust the
tempo In musical terminology, tempo ( Italian, 'time'; plural ''tempos'', or ''tempi'' from the Italian plural) is the speed or pace of a given piece. In classical music, tempo is typically indicated with an instruction at the start of a piece (ofte ...
of recordings independently of their pitch (and musical key, a feature known as "keylock". Some software analyzes the loudness of the music for automatic normalization with
ReplayGain ReplayGain is a proposed technical standard published by David Robinson in 2001 to measure and normalize the perceived loudness of audio in computer audio formats such as MP3 and Ogg Vorbis. It allows media players to normalize loudness for indi ...
and detects the musical key. Additionally, DJ software can store cue points, set loops, and apply
effects Effect may refer to: * A result or change of something ** List of effects ** Cause and effect, an idiom describing causality Pharmacy and pharmacology * Drug effect, a change resulting from the administration of a drug ** Therapeutic effect, a ...
. As
tablet computer A tablet computer, commonly shortened to tablet, is a mobile device, typically with a mobile operating system and touchscreen display processing circuitry, and a rechargeable battery in a single, thin and flat package. Tablets, being com ...
s and
smartphone A smartphone is a portable computer device that combines mobile telephone and computing functions into one unit. They are distinguished from feature phones by their stronger hardware capabilities and extensive mobile operating systems, whic ...
s became widespread, DJ software was written to run on these devices in addition to laptops. DJ software requires specialized hardware in addition to a computer to fully take advantage of its features. The consumer-grade, regular
sound card A sound card (also known as an audio card) is an internal expansion card that provides input and output of audio signals to and from a computer under the control of computer programs. The term ''sound card'' is also applied to external audio ...
integrated into most computer motherboards can only output two channels (one stereo pair). However, DJs need to be able to output at least four channels (two stereo pairs, thus Left and Right for input 1 and Left and Right for input 2), either unmixed signals to send to a DJ mixer or the main output plus a headphone output. Additionally, DJ sound cards output higher-quality signals than the sound cards built into consumer-grade computer motherboards.


Timecode

Special vinyl records (or CDs/digital files played with
CDJ 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 ...
s) can be used with DJ software to play digital music files with DJ software as if they were pressed onto vinyl, allowing
turntablism Turntablism is the art of manipulating sounds and creating new music, sound effects, mixes and other creative sounds and beats, typically by using two or more turntables and a cross fader-equipped DJ mixer. The mixer is plugged into a PA sys ...
techniques to be used with digital files. These vinyl records do not have music recordings pressed onto them. Instead, they are pressed with a special signal, referred to as "timecode", to control DJ software. The DJ software interprets changes in the playback speed, direction, and position of the timecode signal and manipulates the digital files it is playing in the same way that the turntable manipulates the timecode record. This requires a specialized DJ
sound card A sound card (also known as an audio card) is an internal expansion card that provides input and output of audio signals to and from a computer under the control of computer programs. The term ''sound card'' is also applied to external audio ...
with at least 4 channels (2 stereo pairs) of inputs and outputs. With this setup, the DJ software typically outputs unmixed signals from the music files to an external hardware
DJ mixer A DJ mixer is a type of audio mixing console used by disc jockeys (DJs) to control and manipulate multiple audio signals. Some DJs use the mixer to make seamless transitions from one song to another when they are playing records at a dance clu ...
. Some DJ mixers have integrated
USB Universal Serial Bus (USB) is an industry standard that establishes specifications for cables, connectors and protocols for connection, communication and power supply (interfacing) between computers, peripherals and other computers. A broad ...
sound cards that allow DJ software to connect directly to the mixer without requiring a separate sound card.


DJ controllers

A DJ software can be used to mix audio files on the computer instead of a separate hardware mixer. When mixing on a computer, DJs often use a
DJ controller DJ controllers are devices used to help DJs mix music with DJ software using knobs, encoders, jog wheels, faders, backlit buttons, touch strips, and other components. Overview DJ controllers are microprocessor-based control surfaces used to pro ...
device that mimics the layout of two turntables plus a DJ mixer to control the software rather than the
computer keyboard A computer keyboard is a peripheral input device modeled after the typewriter keyboard which uses an arrangement of buttons or keys to act as mechanical levers or electronic switches. Replacing early punched cards and paper tape technolog ...
&
touchpad A touchpad or trackpad is a pointing device featuring a tactile sensor, a specialized surface that can translate the motion and position of a user's fingers to a relative position on the operating system that is made output to the screen. Touchp ...
on a laptop, or the
touchscreen A touchscreen or touch screen is the assembly of both an input ('touch panel') and output ('display') device. The touch panel is normally layered on the top of an electronic visual display of an information processing system. The display is ofte ...
on a
tablet computer A tablet computer, commonly shortened to tablet, is a mobile device, typically with a mobile operating system and touchscreen display processing circuitry, and a rechargeable battery in a single, thin and flat package. Tablets, being com ...
or
smartphone A smartphone is a portable computer device that combines mobile telephone and computing functions into one unit. They are distinguished from feature phones by their stronger hardware capabilities and extensive mobile operating systems, whic ...
. Many DJ controllers have an integrated
sound card A sound card (also known as an audio card) is an internal expansion card that provides input and output of audio signals to and from a computer under the control of computer programs. The term ''sound card'' is also applied to external audio ...
with 4 output channels (2 stereo pairs) that allow the DJ to use headphones to preview music before playing it on the main output.


Other equipment

* A
microphone A microphone, colloquially called a mic or mike (), is a transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones, hearing aids, public address systems for concert halls and publ ...
, so that the DJ can introduce songs and speak to the audience over the sound system. * Electronic
effects unit An effects unit or effects pedal is an electronic device that alters the sound of a musical instrument or other audio source through audio signal processing. Common effects include distortion/overdrive, often used with electric guitar in el ...
s such as delay,
reverb Reverberation (also known as reverb), in acoustics, is a persistence of sound, after a sound is produced. Reverberation is created when a sound or signal is reflected causing numerous reflections to build up and then decay as the sound is abs ...
, octave, equalizer, chorus, etc. * Multi-stylus head shells, which allow a DJ to play different grooves of the same record at the same time. * Samplers, sequencers, electronic musical keyboards (synthesizers), effects pedals (effects unit) or drum machines. *
PA system A public address system (or PA system) is an electronic system comprising microphones, amplifiers, loudspeakers, and related equipment. It increases the apparent volume (loudness) of a human voice, musical instrument, or other acoustic sound sou ...
or sound reinforcement system ( power amplifiers and
speaker enclosure A loudspeaker enclosure or loudspeaker cabinet is an enclosure (often rectangular box-shaped) in which speaker drivers (e.g., loudspeakers and tweeters) and associated electronic hardware, such as crossover circuits and, in some cases, power ...
s), typically including
subwoofer A subwoofer (or sub) is a loudspeaker designed to reproduce low-pitched audio frequencies known as bass and sub-bass, lower in frequency than those which can be (optimally) generated by a woofer. The typical frequency range for a subwoofer i ...
cabinets for deep bass (or, if a DJ is broadcasting and/or recording a set, broadcasting equipment or recording gear) * Monitor speakers, for listening to the "house mix" that is playing over the main speakers


Techniques

Several techniques are used by DJs as a means to better mix and blend recorded music. These techniques primarily include the cueing, equalization and
audio mixing Audio mixing is the process by which multiple sounds are combined into one or more channels. In the process, a source's volume level, frequency content, dynamics, and panoramic position are manipulated or enhanced. This practical, aesthetic ...
of two or more sound sources. The complexity and frequency of special techniques depend largely on the setting in which a DJ is working. Radio DJs are less likely to focus on advanced music-mixing procedures than club DJs, who rely on a smooth transition between songs using a range of techniques. However, some radio DJs are experienced club DJs, so they use the same sophisticated mixing techniques. Club DJ turntable techniques include beatmatching, phrasing and
slip-cueing Slip-cueing is a turntable-based DJ technique which consists of holding a record still while the platter rotates underneath the slipmat and releasing it at the right moment. In this way the record attains the right speed almost immediately, with ...
to preserve energy on a dance floor.
Turntablism Turntablism is the art of manipulating sounds and creating new music, sound effects, mixes and other creative sounds and beats, typically by using two or more turntables and a cross fader-equipped DJ mixer. The mixer is plugged into a PA sys ...
embodies the art of cutting,
beat juggling Beat juggling is a deejaying and turntablism technique in which two records are used to prolong an existing beat, or to create a new one. It is associated with the context of hip hop, but not necessarily limited to this genre. Definition Beat j ...
,
scratching Scratching, sometimes referred to as scrubbing, is a DJ and turntablist technique of moving a vinyl record back and forth on a turntable to produce percussive or rhythmic sounds. A crossfader on a DJ mixer may be used to fade between two record ...
, needle drops,
phase shifting In physics and mathematics, the phase of a periodic function F of some real variable t (such as time) is an angle-like quantity representing the fraction of the cycle covered up to t. It is denoted \phi(t) and expressed in such a scale that it v ...
,
back spinning Back spinning describes the act of manually manipulating a vinyl record (currently playing on a turntable), using enough force to cause the record to spin backward (despite the rotation of the platter beneath it). It is often used in DJing; many ...
and more to perform the transitions and overdubs of samples in a more creative manner (although turntablism is often considered a use of the turntable as a musical instrument rather than a tool for blending recorded music). Professional DJs may use
harmonic mixing Harmonic mixing or key mixing (also referred to as mixing in key) is a DJ's continuous mix between two pre-recorded tracks that are most often either in the same key, or their keys are relative or in a subdominant or dominant relationship ...
to choose songs that are in compatible musical keys. Other techniques include chopping, screwing and looping. Recent advances in technology in both DJ hardware and software can provide assisted or automatic completion of some traditional DJ techniques and skills. Examples include phrasing and beatmatching, which can be partially or completely automated by using DJ software that performs automatic synchronization of sound recordings, a feature commonly labelled "sync". Most
DJ mixer A DJ mixer is a type of audio mixing console used by disc jockeys (DJs) to control and manipulate multiple audio signals. Some DJs use the mixer to make seamless transitions from one song to another when they are playing records at a dance clu ...
s now include a beat counter which analyzes the tempo of an incoming sound source and displays its tempo in
beats per minute Beat, beats or beating may refer to: Common uses * Patrol, or beat, a group of personnel assigned to monitor a specific area ** Beat (police), the territory that a police officer patrols ** Gay beat, an area frequented by gay men * Battery ...
(BPM), which may assist with beatmatching analog sound sources. In the past, being a DJ has largely been a self-taught craft but with the complexities of new technologies and the convergence with music production methods, there are a growing number of schools and organizations that offer instruction on the techniques.


Miming

In DJ culture, miming refers to the practice of DJ's pantomiming the actions of live-mixing a set on stage while a pre-recorded mix plays over the sound system.Wendy Fonarow.
Empire of Dirt: The Aesthetics and Rituals of British Indie Music
'. Wesleyan University Press; 10 July 2006. . p. 270–.
Charles Kriel.
How to DVJ: A Digital DJ Masterclass
'. CRC Press; 25 January 2013. . p. 106–.
Miming mixing in a live performance is considered to be controversial within DJ culture. Some within the DJ community say that miming is increasingly used as a technique by celebrity model DJs who may lack mixing skills, but can draw big crowds to a venue. During a DJ tour for the release of the French group
Justice Justice, in its broadest sense, is the principle that people receive that which they deserve, with the interpretation of what then constitutes "deserving" being impacted upon by numerous fields, with many differing viewpoints and perspective ...
's ''A Cross the Universe'' in November 2008, controversy arose when a photograph of Augé DJing with an unplugged
Akai Akai ( ja, 赤井, ) is a Hong Kong manufacturer of consumer electronics. It was founded as Akai Electric Company Ltd in Tokyo, Japan, in 1946. Grande Holdings in Hong Kong purchased the Akai brand, and now distributes various electronic produ ...
MPD24 surfaced. The photograph sparked accusations that Justice's live sets were faked. Augé has since said that the equipment was unplugged very briefly before being reattached and the band put a three-photo set of the incident on their MySpace page. After a 2013
Disclosure Disclosure may refer to: Arts and media * ''Disclosure'' (The Gathering album), 2012 *Disclosure (band), a UK-based garage/electronic duo * ''Disclosure'' (novel), 1994 novel written by Michael Crichton ** ''Disclosure'' (1994 film), an American ...
concert, the duo was criticized for pretending to live mix to a playback of a pre-recorded track. Disclosure's Guy Lawrence said they did not deliberately intend to mislead their audience, and cited miming by other DJs such as
David Guetta Pierre David Guetta ( , ; born 7 November 1967) is a French DJ and music producer. He has over 10 million album and 65 million single sales globally, with more than 10 billion streams. In 2011, 2020 and 2021, Guetta was voted the number one D ...
.


History

Playing recorded music for dancing and parties rose with the mass marketing of home phonographs in the late 19th century. British radio disc jockey Jimmy Savile hosted his first live dance party in 1943 using a single turntable and a makeshift sound system. Four years later, Savile began using two turntables welded together to form a single DJ console. In 1947, the Whisky à Gogo opened in Paris as the first
discotheque A nightclub (music club, discothèque, disco club, or simply club) is an entertainment venue during nighttime comprising a dance floor, lightshow, and a stage for live music or a disc jockey (DJ) who plays recorded music. Nightclubs gene ...
. In 1959, one of the first discos in Germany, the Scotch Club, opened in Aachen and visiting journalist Klaus Quirini (later DJ Heinrich) made comments, conducted audience games, and announced songs while playing records. The first song he played was the hit ''Ein Schiff wird kommen'' by
Lale Andersen Lale Andersen (23 March 1905 – 29 August 1972) was a German chanson singer-songwriter and actress born in Lehe (now part of Bremerhaven). She is best known for her interpretation of the song ''Lili Marleen'' in 1939, which by 1941 transcend ...
. In the 1960s, Rudy Bozak began making the first
DJ mixer A DJ mixer is a type of audio mixing console used by disc jockeys (DJs) to control and manipulate multiple audio signals. Some DJs use the mixer to make seamless transitions from one song to another when they are playing records at a dance clu ...
s, mixing consoles specialized for DJing. In the late 1960s to early 1970s Jamaican sound system culture, producer and sound system operator (DJ), (Jamaican)
King Tubby Osbourne Ruddock (28 January 1941 – 6 February 1989), better known as King Tubby, was a Jamaican sound engineer who greatly influenced the development of dub in the 1960s and 1970s. Tubby's innovative studio work, which saw him elevate the ...
and producer Lee "Scratch" Perry were pioneers of the genre known as dub music.Michael Veal (2013)
''Dub: Soundscapes and Shattered Songs in Jamaican Reggae'', pages 26–44, "Electronic Music in Jamaica"
Wesleyan University Press.
Nicholas Collins, Margaret Schedel, Scott Wilson (2013)
''Electronic Music: Cambridge Introductions to Music'', page 20
Cambridge University Press.
They experimented with Tape music, tape-based composition; emphasized repetitive rhythmic structures (often stripped of their harmonic elements); electronically manipulated spatiality; sonically manipulated pre-recorded musical materials from mass media; and remixed music among other innovative techniques. It is widely known that the Jamaican dancehall culture has had and continues to have a significant impact on the American hip hop culture. DJ
turntablism Turntablism is the art of manipulating sounds and creating new music, sound effects, mixes and other creative sounds and beats, typically by using two or more turntables and a cross fader-equipped DJ mixer. The mixer is plugged into a PA sys ...
has origins in the invention of direct-drive turntables. Early belt-drive turntables were unsuitable for turntablism and mixing, since they had a slow start-up time, and they were prone to wear-and-tear and breakage, as the belt would break from backspinning or scratching. The first direct-drive turntable was invented by engineer Shuichi Obata at Panasonic, Matsushita (now Panasonic), based in Osaka, Japan. It eliminated belts, and instead employed a motor to directly drive a platter on which a vinyl record rests.Trevor Pinch, Karin Bijsterveld
''The Oxford Handbook of Sound Studies'', p. 515
Oxford University Press.
In 1969, Matsushita released it as the Technics (brand), SP-10, the first direct-drive turntable on the market, and the first in their influential Technics (brand), Technics series of turntables. In 1972, Technics started making their Technics SL-1200, SL-1200 turntable, featuring high torque direct-drive turntable, direct drive design.Six Machines That Changed The Music World
''Wired (magazine), Wired'', May 2002.
The SL-1200 had a rapid start and its durable direct drive enabled DJs to manipulate the platter, as with scratching techniques. Hip hop DJs began using the Technics SL-1200s as musical instruments to manipulate records with
turntablism Turntablism is the art of manipulating sounds and creating new music, sound effects, mixes and other creative sounds and beats, typically by using two or more turntables and a cross fader-equipped DJ mixer. The mixer is plugged into a PA sys ...
techniques such as
scratching Scratching, sometimes referred to as scrubbing, is a DJ and turntablist technique of moving a vinyl record back and forth on a turntable to produce percussive or rhythmic sounds. A crossfader on a DJ mixer may be used to fade between two record ...
and
beat juggling Beat juggling is a deejaying and turntablism technique in which two records are used to prolong an existing beat, or to create a new one. It is associated with the context of hip hop, but not necessarily limited to this genre. Definition Beat j ...
rather than merely mixing records. These techniques were developed in the 1970s by
DJ Kool Herc Clive Campbell (born April 16, 1955), better known by his stage name DJ Kool Herc, is a Jamaican-American DJ who is credited with contributing to the development of hip hop music in the Bronx, New York City, in the 1970s through his "Back to ...
, Grand Wizard Theodore, and Afrika Bambaataa, as they experimented with Technics direct-drive decks, finding that the motor would continue to spin at the correct Revolutions per minute, RPM even if the DJ wiggled the record back and forth on the platter. In 1980, Japanese company Roland Corporation, Roland released the Roland TR-808, TR-808, an analog Drum machine, rhythm/drum machine, which has unique artificial sounds, such as its booming Bass drum, bass and sharp Snare drum, snare, and a metronome-like rhythm. Yellow Magic Orchestra's use of the instrument in 1980 influenced hip hop pioneer Afrika Bambaataa, after which the TR-808 would be widely adopted by hip hop DJs, with 808 sounds remaining central to hip-hop music ever since.Neil Kulkarni (2015)
''The Periodic Table of HIP HOP'', p. 44
Random House.
808 (film), ''808'' (documentary film). The Roland TB-303, a bass synthesizer released in 1981, had a similar impact on electronic dance music genres such as
techno Techno is a Music genre, genre of electronic dance music (EDM) which is generally music production, produced for use in a continuous DJ set, with tempo often varying between 120 and 150 beats per minute (bpm). The central Drum beat, rhythm is typ ...
and house music, along with Roland's TR-808 and TR-909 drum machines.Complex.com
Mixmag
In 1982, the Compact Disc (CD) format was released, popularizing digital audio. In 1998, the first MP3 digital audio player, the Eiger Labs MPMan F10, was introduced. In January of that same year at the BeOS Developer Conference, N2IT demonstrated FinalScratch, the first digital DJ system to allow DJs control of MP3 files through special time-coded vinyl records or CDs. While it would take some time for this novel concept to catch on with the "die-hard Vinyl DJs," this would become the first step in the Digital DJ revolution. Manufacturers joined with computer DJing pioneers to offer professional endorsements, the first being Professor Jam (a.k.a. William P. Rader), who went on to develop the industry's first dedicated computer DJ convention and learning program, the "CPS (Computerized Performance System) DJ Summit", to help spread the word about the advantages of this emerging technology. In 2001, Pioneer DJ began producing the CDJ#CDJ-1000, CDJ-1000 CD player, making the use of digital music recordings with traditional DJ techniques practical for the first time. As the 2000s progressed, laptop computers became more powerful and affordable. #Software, DJ software, specialized DJ
sound card A sound card (also known as an audio card) is an internal expansion card that provides input and output of audio signals to and from a computer under the control of computer programs. The term ''sound card'' is also applied to external audio ...
s, and
DJ controller DJ controllers are devices used to help DJs mix music with DJ software using knobs, encoders, jog wheels, faders, backlit buttons, touch strips, and other components. Overview DJ controllers are microprocessor-based control surfaces used to pro ...
s were developed for DJs to use laptops as a source of music rather than turntables or CDJs. In the 2010s, like laptops before them,
tablet computer A tablet computer, commonly shortened to tablet, is a mobile device, typically with a mobile operating system and touchscreen display processing circuitry, and a rechargeable battery in a single, thin and flat package. Tablets, being com ...
s and
smartphone A smartphone is a portable computer device that combines mobile telephone and computing functions into one unit. They are distinguished from feature phones by their stronger hardware capabilities and extensive mobile operating systems, whic ...
s became more powerful & affordable. DJ software was written to run on these more portable devices instead of laptops, although laptops remain the more common type of computer for DJing.


Female DJs

In Western popular music, Women in music, women musicians have achieved great success in singing and songwriting roles, however, there are relatively few women DJs or turntablists. Part of this may stem from a generally low percentage of women in audio technology-related jobs. A 2013 ''Sound on Sound'' article stated that there are "... few women in Music producer, record production and sound engineering." Ncube states that "[n]inety-five percent of music producers are male, and although there are female producers achieving great things in music, they are less well-known than their male counterparts." The vast majority of students in music technology programs are male. In hip hop music, the low percentage of women DJs and turntablists may stem from the overall male domination of the entire hip hop music industry. Most of the top rappers, MCs, DJs, record producers and music executives are men. There are a small number of high-profile women, but they are rare. In 2007 Mark Katz's article "Men, Women, and Turntables: Gender and the DJ Battle", stated that "very few women [do turntablism] battle[s]; the matter has been a topic of conversation among hip-hop DJs for years." In 2010 Rebekah Farrugia states "the male-centricity of EDM culture" contributes to "a marginalisation of women in these [EDM] spaces." While turntablism and broader DJ practices should not be conflated, Katz suggests use or lack of use of the turntable broadly by women across genres and disciplines is impacted upon by what he defines as "male technophilia". Historian Ruth Oldenziel concurs in her writing on engineering with this idea of socialization as a central factor in the lack of engagement with technology. She says:
an exclusive focus on women's supposed failure to enter the field – is insufficient for understanding how our stereotypical notions have come into being; it tends to put the burden of proof entirely on women and to blame them for their supposedly inadequate socialization, their lack of aspiration, and their want of masculine values. An equally challenging question is why and how boys have come to love things technical, how boys have historically been socialized as technophiles.
Lucy Green has focused on gender in relation to musical performers and creators, and specifically on educational frameworks as they relate to both. She suggests that women's alienation from "areas that have a strong technological tendency such as DJing, sound engineering and producing" are "not necessarily about her dislike of these instruments but relates to the interrupting effect of their dominantly masculine delineations." Despite this, women and girls do increasingly engage in turntable and DJ practices, individually and collectively, and "carve out spaces for themselves in EDM and DJ Culture". A 2015 article cited a number of prominent female DJs: Hannah Wants, Ellen Allien, Miss Kittin, Monika Kruse, Nicole Moudaber, B.Traits, Magda, Nina Kraviz, Nervo (DJs), Nervo, and Annie Mac. Two years later, another article brings out a list with world-famous female DJs including Nastia, tINY, Nora En Pure, Anja Schneider, Peggy Gou, Maya Jane Coles, and Eli & Fur. Female DJ The Black Madonna has been called "one of the world’s most exciting turntablists." Her stage name The Black Madonna is a tribute to her mother's favorite Black Madonna, Catholic saint. In 2018, The Black Madonna played herself as an in-residence DJ for the video game ''Grand Theft Auto Online'', as part of the ''After Hours'' Downloadable content, DLC. There are various projects dedicated to the promotion and support of these practices such as Female DJs London. Some artists and collectives go beyond these practices to be more gender inclusive. For example, Discwoman, a New York-based collective and booking agency, describe themselves as "representing and showcasing cis women, trans women and genderqueer talent." In Japan, the newest Bushiroad franchise: ''D4DJ'' focuses on an all-female DJ unit.


Health

The risk of DJs working in nightclubs with loud music includes noise-induced hearing loss and tinnitus. Nightclubs constantly exceed safe levels of noise exposure with average sound levels ranging from 93.2 to 109.7 dB. Constant music exposure creates temporary and permanent auditory dysfunction for professional DJs with average levels at 96dB being above the recommended level, at which ear protection is mandatory for industry. Three-quarters of DJs have tinnitus and are at risk of tenosynovitis in the wrists and other limbs. Tenosynovitis results from staying in the same position over multiple gigs for scratching motion and cueing, this would be related to a repetitive strain injury. Gigs can last 4-5 hours in nightlife and the hospitality industry, as a result, there are potential complications of prolonged standing which include slouching, varicose veins, cardiovascular disorders, joint compression, and muscle fatigue. This is common for other staff to experience as well including bartenders and security staff for example.


In film

* ''Berlin Calling'' – a German film about fictional DJ and producer Ickarus (Paul Kalkbrenner), who is struggling with drug abuse * ''Speaking in Code'' – an American documentary film about
techno Techno is a Music genre, genre of electronic dance music (EDM) which is generally music production, produced for use in a continuous DJ set, with tempo often varying between 120 and 150 beats per minute (bpm). The central Drum beat, rhythm is typ ...
artists Modeselektor, Wighnomy Brothers, Philip Sherburne, Monolake and David Day * ''Kvadrat (film), Kvadrat'' – a French and Russian documentary film about the realities of
techno Techno is a Music genre, genre of electronic dance music (EDM) which is generally music production, produced for use in a continuous DJ set, with tempo often varying between 120 and 150 beats per minute (bpm). The central Drum beat, rhythm is typ ...
DJing, using the example of DJ Andrey Pushkarev * ''It's All Gone Pete Tong'' – a fictional mockumentary British movie about Frankie Wilde, a DJ who gradually becomes deaf due to drug abuse and an unhealthy lifestyle * ''We Are Your Friends (film), We Are Your Friends'' – an American fiction film about a college DJ trying to make it in the DJing scene with "one hit song", starring Zac Efron * ''Scratch (2001 film), Scratch'' – a documentary about the hip-hop DJ and the 2000-era turntablist movement * ''Tonkatsu DJ Agetarou'' – a Japanese anime, originally a manga, about a fictional character named Agetarou who aspires to be a DJ master with the help of his friends and mentor, Big Master Fry. *''24 Hour Party People'' – about the UK music scene from the late 1970s to the "Madchester" scene of the late 1980s and early 1990s. *''Human Traffic –'' about early UK rave counter-culture featuring music and performances by celebrated DJs Fatboy Slim, CJ Bolland, Carl Cox, and Mad Doctor X. *''Turn Up Charlie'' – a 2019 series about a struggling DJ, played by Idris Elba, who is also a bachelor trying to make it again after a one-hit back in the 1990s * ''Avicii: True Stories'' – a documentary film about Avicii


See also

* Digital DJ licensing * List of club DJs * List of music software#DJ software * Live PA * DJ mix * Record collecting * Spelling of disc * Stage lighting * VJ (media personality)


References


Notes

* Assef, Claudia (2000). ''Todo DJ Já Sambou: A História do Disc-Jóquei no Brasil''. São Paulo: Conrad Editora do Brasil. . * Brewster, Bill, and Frank Broughton (2000). ''Last Night a DJ Saved My Life: The History of the Disc Jockey''. New York: Grove Press. (North American edition). London: Headline. (UK edition). * Broughton, Frank, and Bill Brewster. ''How to DJ Right: The Art and Science of Playing Records''. New York: Grove Press, 2003. * Graudins, Charles A. ''How to Be a DJ''. Boston: Course Technology PTR, 2004. * Lawrence, Tim (2004). ''Love Saves the Day: A History of American Dance Music Culture, 1970–1979 ''. Duke University Press. . * Miller, Paul D. a.k.a. DJ Spooky, ''Sound Unbound: Writings on DJ Culture and Electronic Music'', MIT Press 2008. . * Poschardt, Ulf (1998). ''DJ Culture''. London: Quartet Books. . * Zemon, Stacy. ''The Mobile DJ Handbook: How to Start & Run a Profitable Mobile Disc Jockey Service'', Second Edition. St. Louis: Focal Press, 2002.


External links

* {{DEFAULTSORT:Disc Jockey Audio mixing Broadcasting occupations Disco DJing, Mass media occupations Occupations in music Radio presenters, Hip hop production Turntablism Underground culture Electronic dance music 1930s neologisms Articles containing video clips