Popular music

• 1. Introduction

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  Popular music is the only art form in modern history built on the premise that anyone can enjoy it without training, without a score, without years of study. In the 1880s, the district in New York known as Tin Pan Alley gave that idea a name and a business model. What followed was more than a century of argument, invention, and transformation that reshaped how human beings share feeling across distance and class.

  The questions worth asking are not simply what popular music is, but how scholars have fought over its definition, how its forms have changed measurably from decade to decade, and how it travels across cultures, picking up new meanings as it goes. Those questions do not have tidy answers. But they have illuminating ones.

• 2. What Makes Music Popular

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  Scholars have never agreed on a single definition, and the disagreements are instructive. One approach classifies music as popular when listeners come to know it mainly by hearing it rather than reading a score - a distinction that separates it from classical training. Another approach treats popularity as a market measure, counting sales of recordings or sheet music. But as Middleton and Manuel have pointed out, that method fails because multiple listens to the same song are not counted in those sales figures.

  Anahid Kassabian proposed four distinct categories to cut through the confusion. The first she called "popular as populist," associating it with liberation and expression - jazz, Latin music, and rhythm and blues fit here. The second, "popular as folk," describes music written by the people for the people, covering country music, reggae, and gospel. The third, "popular as counterculture," captures music that empowers citizens to resist oppression, including punk rock, heavy metal, and hip-hop. The fourth is the most unsettling: "popular as mass," where the music itself becomes a tool of oppression rather than resistance.

  David Riesman added another dimension by observing that youth audiences divide into two camps. The majority group gravitates toward commercially produced styles. Subcultures seek out minority styles that carry their own values. This split gives young listeners genuine power as consumers, since their choices collectively shape which music the market sustains.

  Music critic Robert Christgau coined the term "semipopular music" in 1970 to describe a gap he noticed in the record business. He cited albums like The Velvet Underground and The Gilded Palace of Sin by Flying Burrito Brothers as works that carried populist qualities yet failed to chart. He described the category as "a cross-bred concentration of fashionable modes," distinct from both classical dilutions and straightforward commercial pop. His observation pointed to a distribution system he felt was faltering, with FM radio and the album market behaving in ways that didn't map onto older ideas of audience appeal.

• 3. The Architecture of a Song

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  Tin Pan Alley did not only name an era; it hardwired a set of structural habits into popular music that have persisted across genres. The dominant form is sectional: verse, chorus or refrain, and bridge. The verse carries changing lyrics over a consistent melody. The chorus returns to the same melodic phrase and key lyrical line each time. The bridge provides a contrasting section, used to break the repetition before the chorus returns.

  Thirty-two-bar form organizes a song into four sections of eight measures each, following an AABA pattern: two verse sections, a contrasting bridge sometimes called the "middle eight," and a return to the verse. Twelve-bar blues offers a simpler template, where the repetition of one chord progression defines the entire song. Both forms can combine in compound arrangements that mix AABA structure with verse-chorus alternation.

  Solos appear most often in rock or blues-influenced pop, where a single performer - a guitarist or harmonica player, for instance - plays a melodic line that may follow the sung melody or improvise against the chord progression. The use of multiple instrumentalists for a solo is less common but not unknown. Introductions and codas, sometimes called outros, are optional elements; they appear in many songs but are not essential to how listeners identify a song's core identity.

  Popular songs are rarely through-composed, meaning they almost never set different music to each new stanza of lyrics. The return of familiar melodic material is not a limitation of the form. It is the form's central strategy for making music accessible to listeners who have had no formal training.

• 4. Industry and Technology

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  Sheet music was the original engine. In the late 18th and early 19th centuries, inexpensive printed music reached amateur, middle-class players who could reproduce popular songs at home, most often on the piano. The piano's ability to carry melody, chords, and basslines simultaneously made it the ideal domestic instrument for this market. Public venues - pleasure gardens, dance halls, popular theatres, and concert rooms - extended the reach beyond the living room.

  Swedish opera singer Jenny Lind, who toured the United States in the mid-19th century, was among the first performers to achieve widespread popularity in this system, working alongside the sheet music industry to promote new songs. Player pianos extended that reach further by allowing a skilled pianist's performance to be recorded and played back for listeners who could not play themselves.

  By 1920, there were almost 80 record companies in Britain and almost 200 in the United States. Radio broadcasting, which began in the early 1920s, carried popular songs to audiences that included lower-income groups who had previously been unable to afford concert tickets. Sound films, introduced in the late 1920s, added another channel. Television arrived in the 1950s and 1960s and made variety shows a new showcase for singers and bands.

  Multitrack recording, developed in the 1960s, changed the creative process itself. Sound engineers could build performances that were impossible in live conditions - singers harmonizing with their own overdubbed vocals, lead guitarists laying rhythm parts beneath their solos. Robert Christgau described the 1970s as a decade when "rock industrialists capitalized on the national mood to reduce potent music to an often reactionary species of entertainment," transmuting rock's popular base "from audience to market."

  By the 1970s, the recording industry had consolidated to the point where dominance rested in five transnational organizations: three American-owned companies - WEA, RCA, and CBS - and two European-owned ones - EMI and Polygram. The 1980s brought digital equipment, including mixing desks, synthesizers, samplers, and sequencers, which the Grove Dictionary of Music described as creating "new sound worlds." By the 1990s, laptop-based recording had made it possible for amateur bands to produce albums that previously would have required a fully equipped professional studio, though professional studio audio quality still surpassed what amateurs could achieve.

• 5. Songs Getting Slower, Sadder, Stranger

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  The average beats per minute of popular songs fell from 116 in the 1960s to 100 BPM in the 2000s. That is a measurable shift in physical tempo across four decades of recorded music. Song length changed too, but in a more complicated pattern. Vinyl record singles physically limited songs to roughly three minutes because that was all the format could hold. Radio in the 1960s reflected that constraint, with the average song running about three minutes.

  The introduction of CDs in 1982 lifted that ceiling, and streaming removed it entirely. But streaming has also pushed songs shorter again by a different mechanism. Artists are paid per individual stream, so longer songs can mean fewer streams and less income. By 2018, the average song length had dropped to 3 minutes and 30 seconds, which was 20 seconds shorter than the average in 2014. The Billboard Top 5 in 2018 featured songs running between 3 minutes 21 seconds and 3 minutes 40 seconds.

  Key signatures shifted alongside tempo. In the 1960s, around 85 percent of popular songs were in a major key. By the time these measurements were taken, that figure had fallen to roughly 40 percent, with minor keys occupying much of the space that major keys once held. Lyrics grew sadder and more antisocial and self-centered compared to the content of earlier decades.

  One further change is harder to categorize: the emotional associations between tempo, key, and subject matter have become less consistent. Fast songs now regularly appear with sad subject matter or in minor keys. Slow songs carry happier content or sit in major keys. The expected pairing between musical mood and lyrical mood has loosened, leaving listeners with combinations that would have been unusual in earlier decades. Researchers point to globalization as one possible factor, suggesting that more diverse international audiences bring more varied expectations about what emotional register a given musical choice should signal.

• 6. Music Crossing Borders

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  The label "world music" was applied to genres originating outside the West, and that label carries a structural problem. As scholars have noted, it homogenizes hundreds of distinct popular traditions under a single term designed to make them accessible to Western audiences. What it actually does is mark them as exotic and peripheral, regardless of how widely they are heard within their own cultures.

  Africa offers a case study in how popular music traditions develop along their own lines without following Western templates. African popular styles grew from traditional entertainment genres rather than from ceremonial music tied to weddings, births, or funerals. African-American and Afro-Latin influences mixed with European influences and region-specific styles. Maskanda, a traditional music genre popular in South Africa, illustrates the commercial pressures this creates. The maskandi artist Phuzekhemisi, working with producer West Nkosi, had to reduce the political content in his music to make it viable for the commercial market.

  Hip-hop in Africa presents a different dynamic. Though built on the North American template, it has been remade to carry new meanings for African young people, and artists who came up in traditional genres like maskanda have moved into hip-hop to build more sustainable careers. African hip-hop practitioners compare themselves to the griot and oral storyteller, both figures whose historical role was to reflect on the internal life of their societies.

  In Indonesia, the genre Dangdut fused indo pop and underground music, taking noisy instrumentation from underground styles and softening it toward the accessibility of pop. Punk in Indonesia developed through local interpretation of global punk media. Scholar Jeremy Wallach notes that while Green Day was perceived in some circles as marking the death of punk, in Indonesia the band served as a catalyst for a larger punk movement.

  In China, a policy shift since the late 1970s opened the country to international exchange, and by 2015 students in Shanghai accounted for 30.2 percent of China's internet population. The third and fifth most popular internet activities among that group were, respectively, streaming music and streaming video. Students reported connecting emotionally to Chinese-language music while also valuing Anglo-American melodies, and some believed that listening to English-language songs improved their English. The late Egyptian singer Umm Kulthum framed the same tension for the Arab world in direct terms, arguing that Egypt needed to take pride in its indigenous popular styles before they were absorbed into Western-driven modernization.