Popular music is a broad historical category referring to music created, distributed and consumed for relatively large audiences, especially through commercial and mass communication systems. Unlike a single musical genre, popular music encompasses changing forms such as music hall, ragtime, Tin Pan Alley songwriting, jazz, blues, country, rhythm and blues, rock and roll, soul, funk, disco, punk, hip hop, electronic dance music and many forms of contemporary pop.
Its history is closely connected to technology and commerce because the meaning of popular music changes as new methods of producing, recording, distributing and hearing music emerge. Sheet music, mechanical recordings, radio, cinema, television, records, cassettes, compact discs, downloads and streaming have each reshaped what could become popular.
Nineteenth century urbanisation and industrialisation created conditions for the development of modern commercial popular music. Printed sheet music allowed songs to circulate beyond their original performers, while music publishers and professional songwriters developed commercial systems in major cities. In the United States, Tin Pan Alley became associated with a powerful songwriting and publishing industry centred on New York. Vaudeville, music hall, minstrel traditions, ragtime and other forms contributed to a rapidly changing commercial musical environment. These traditions were often entangled with racial inequality, appropriation and exploitation, so the history of popular music cannot be separated from the social history of the societies in which music was produced and sold.
Sound recording fundamentally changed popular music because it separated musical performance from the immediate presence of the performer. Early phonograph and gramophone technology made it possible to reproduce performances, creating new markets for recorded music and gradually encouraging listeners to value particular performers and recordings as objects of consumption. The development of electrical recording improved sound quality, while later magnetic tape allowed easier editing, duplication and studio experimentation. The recording industry consequently became an important gatekeeper, influencing which musicians could record, how songs were marketed and which musical styles reached large audiences. Recording also created a historical archive that allows modern listeners to hear performances that would otherwise have disappeared.
Radio transformed popular music by providing a relatively inexpensive method of distributing music simultaneously to large audiences. During the twentieth century, broadcasters, record companies, publishers and performers developed interdependent relationships. Radio exposure could increase record sales, while record companies increasingly tailored releases towards broadcast formats and mass audiences. Cinema also contributed by combining music with celebrity images and narrative entertainment. Television later intensified this relationship, particularly through programmes that displayed performers visually. The emergence of the music video eventually made visual presentation an integral part of popular music marketing. Each medium therefore changed not merely distribution but also songwriting, performance style, stage presentation, celebrity culture and audience expectations.
African American musical traditions were foundational to much modern popular music, including blues, jazz, gospel, rhythm and blues, soul, funk, hip hop and rock and roll. African American musicians developed distinctive approaches to rhythm, harmony, improvisation, vocal expression and call and response, drawing upon complex combinations of African diasporic traditions, African American religious music, work songs, field hollers and European musical structures.
The commercial history of these traditions also includes unequal access to recording contracts, segregated markets, discriminatory radio practices and situations in which white performers gained greater commercial recognition for styles developed by Black musicians. Understanding popular music therefore requires attention to both musical innovation and the racial economics of the entertainment industry.
Popular music became increasingly genre based during the twentieth century, although genre boundaries have always been porous. Jazz influenced rhythm and blues and rock, country contributed to rock and roll, gospel influenced soul, funk developed from rhythm and blues, disco contributed to dance music, Jamaican styles influenced reggae and later popular genres, and hip hop incorporated sampling from an enormous range of earlier recordings. Genre names are useful classification tools but can obscure the constant exchange of musical ideas. A song may therefore contain characteristics of several traditions simultaneously. The historical development of popular music is better understood as a network of overlapping traditions than as a simple sequence in which one genre completely replaces another.
Digital technology transformed popular music again during the late twentieth and early twenty first centuries. Digital recording reduced some production costs, computer based sequencing expanded compositional possibilities, file sharing disrupted established distribution models, and streaming changed the economic relationship between listeners and recordings. Social media and online video also weakened some traditional gatekeeping functions previously controlled by record companies, radio stations and television networks. At the same time, major platforms became powerful new intermediaries. Contemporary popular music can therefore emerge through highly centralised global corporations and highly decentralised online communities simultaneously. The result is an environment in which local, niche and global musical cultures can coexist and influence one another.
The history of popular music is ultimately a history of changing relationships among music, technology, commerce, identity and audiences. It is not equivalent to pop music alone, because popular music includes many genres that have been commercially successful or culturally widespread without fitting the narrower category of pop. Its development has been driven by performers and composers but also by publishers, record labels, broadcasters, engineers, retailers, venues, journalists and audiences. Changes in technology repeatedly alter the balance between these groups. Consequently, popular music should be understood not as a fixed musical style but as a changing cultural and industrial system through which music becomes widely circulated, consumed and remembered.
