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A disc jockey — a person who selects and plays recorded music for an audience.
A DJ (disc jockey) selects, sequences, and presents recorded music for a live audience or broadcast. The role has evolved from radio DJs who played records on air to club DJs who mix tracks for dancers, hip-hop DJs who use turntables as instruments, and producer-DJs who create and perform their own electronic music. Club and festival DJs use beat matching, EQ, effects, and creative mixing to create seamless, evolving musical journeys from individual tracks. The DJ's skill lies in reading the crowd — sensing what the audience wants and building energy through careful song selection and mixing technique. In hip-hop, the DJ is a founding element of the culture, working alongside the MC (rapper). Festival-headlining DJs in electronic and house music now command audiences of hundreds of thousands.
The world's first radio DJ was Ray Newby, who began playing records on-air in 1909 from a radio station at Herrold College in San Jose, California.