Music genre

• 1. Introduction

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  A music genre is a conventional category, and yet almost no one agrees on where its borders lie. The source calls these classifications subjective and controversial, admits that some overlap, and warns that the artistic nature of music keeps unsettling the lines. Over 1,200 definable subgenres have piled up across the 20th century. Screamo, country pop, mumble rap. As fast as listeners name a sound, a fusion or a microgenre splinters off from it. So what actually holds a genre together when style and form keep slipping out from under the word? Why do scholars and platforms reach for such different tools to map the same territory? And what happens to a piece of music that refuses to sit in just one box? Those questions run underneath every label, from a Renaissance madrigal to a track sorted by an algorithm. The rest of this documentary follows the people who tried to answer them.

• 2. Form, Style, And Definition

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  Douglass M. Green, in his book Form in Tonal Music, draws a hard line between genre and form. He points to Beethoven's Op. 61 and Mendelssohn's Op. 64 as proof: both are violin concertos, identical in genre, yet built in different forms. He flips the comparison too. Mozart's Rondo for Piano, K. 511, and the Agnus Dei from his Mass, K. 317, are quite different in genre but happen to be similar in form.

  Franco Fabbri offered the definition now treated as normative. In 1982 he described musical genre as a set of musical events whose course is governed by a definite set of socially accepted rules. A musical event, in his terms, is any type of activity performed around any type of event involving sound. The rules, in other words, come from people, not from the notes alone.

  The word style fractures where genre holds. Peter van der Merwe treats genre and style as the same thing, arguing a genre is simply music sharing a certain basic musical language. Allan F. Moore disagrees, keeping them separate and noting that secondary characteristics such as subject matter can divide one genre from another. Green himself reached back to the Renaissance for his examples, listing madrigal, motet, canzona, ricercar, and dance as genres of that period.

• 3. How New Genres Splinter

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  A subgenre is a subordinate within a genre, borrowing the parent's basic traits while adding its own. The proliferation of popular music across the 20th century pushed the count past 1,200 definable subgenres. Sometimes a single piece sits at the intersection of two or more genres and belongs to each at once. These are fusion genres. Jazz fusion blends jazz and rock; country rock blends country and rock.

  New styles rarely arrive from nowhere. The source notes that while it is conceivable to invent a style with no relation to anything before it, new styles usually appear under the influence of pre-existing genres. The family tree of music, the genealogy of genres, often gets drawn out as a written chart. A microgenre marks the narrowest tier, a niche subcategory tucked inside major genres or their subgenres.

  Timothy Laurie tracked how the very idea of genre grew. Since the early 1980s, he argues, genre has graduated from being a subset of popular music studies to being an almost ubiquitous framework for constituting and evaluating musical research objects. The word itself spread faster than any single sound it described.

• 4. Mapping By Triangle And Touch

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  Philip Tagg sorted music into an axiomatic triangle of folk, art, and popular musics, with each corner distinguishable by certain criteria. He held that popular music parts ways with art music through its mass distribution strategy and its non-written distribution modes, which create distinct production and consumption patterns. The triangle was a way to keep three vast traditions from collapsing into one another.

  Vincenzo Caporaletti proposed a different axis near the end of the 20th century. His distinction rests on the formative medium, the creative interface an artist actually uses, which he splits into two matrixes: visual or audiotactile. His Audiotactile Music Theory then sorts music into three branches. Written music, like classical, comes from the visual matrix. Oral music, like folk before sound recording, is the second. The third is audiotactile music, built around recording technology, covering jazz, pop, rock, and rap.

  Another approach drops categories entirely and rates music on three dimensions. Arousal runs from intense, forceful, abrasive, thrilling to gentle, calming, mellow. Valence runs from fun, happy, lively, joyful to depressing, sad. Depth runs from intelligent, sophisticated, poetic to party music and danceable. These dimensions help explain why people enjoy similar songs pulled from traditionally segregated genres.

• 5. When Machines Draw The Lines

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  Glenn McDonald, an employee of The Echo Nest, turned the question over to an algorithm. The Echo Nest is a music intelligence and data platform owned by Spotify. McDonald built a categorical perception spectrum of genres and subgenres, described as an algorithmically generated, readability-adjusted scatter-plot of the musical genre-space. The data behind it tracked 5,315 genre-shaped distinctions. He called the project Every Noise at Once.

  The machines reach the genre map through different math than the scholars. Automatic methods of musical similarity detection rest on data mining and co-occurrence analysis. They were developed to classify music titles for electronic music distribution, sorting songs by how often they appear together rather than by any rulebook a critic might recognize. It is a long way from Fabbri's socially accepted rules to a scatter-plot of 5,315 distinctions.

• 6. The Written And The Sung

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  Art music, in Western practice, lives on the page. The source describes it as primarily a written tradition, preserved in music notation rather than handed down orally, by rote, or through recordings. That notation evolved in Europe, beginning well before the Renaissance and reaching maturity in the Romantic period. The identity of a work is fixed by its notated version and tied to the composer rather than the performer, especially in western classical music. Even art music has its rebels. The 1960s brought a wave of avant-garde free jazz from Ornette Coleman, Sun Ra, Albert Ayler, Archie Shepp, and Don Cherry, while Frank Zappa, Captain Beefheart, and the Residents released art music albums under the banner of avant-garde rock.

  Folk music is art music's mirror image, carried by voice instead of ink. It passes orally from one generation to the next, often with an unknown artist and several versions of the same song, transmitted by singing, listening, and dancing. The International Council for Traditional Music defines traditional music as songs and tunes performed over a long period, usually several generations, and traditional music is widely accepted to encompass folk. These songs hold rich evidence of the history and social class that made them.

  Every country, and sometimes each region, district, and community, carries its own folk style. English folk music has developed since the medieval period. Turkish folk music reaches back through all the civilizations that once passed through Turkey, shaped by the east-west tensions of the Early Modern Period. The instruments split by place too, yet some travel everywhere: button or piano accordion, flutes, trumpets, banjo, and ukulele. French and Scottish folk music share the fiddle, the harp, and variations of bagpipes. A later wave reshaped the genre for recording, with Bob Dylan; Peter, Paul and Mary; James Taylor; and Leonard Cohen, followed by Ed Sheeran in pop folk and the Lumineers in American folk.

• 7. The Many Faces Of Popular Music

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  Country music began in the southern United States in the early 1920s, also carrying the names country and western and hillbilly music. Its roots reach into European folk music, plus ballads and dance tunes brought by British immigrants, who fused those with the blues and spirituals of African Americans into a separate form. Other popular styles trace their own origin points. Jazz rose in the African-American communities of New Orleans, Louisiana, in the late 19th and early 20th centuries, drawing on blues and ragtime. Funk emerged in African American communities in the mid-1960s from a mixture of soul, jazz, and rhythm and blues.

  New York City gave rise to hip-hop in the early 1970s, alongside a subculture built by African-American and Latino communities. The genre leans on rapping so heavily that it has nearly become a defining trait, alongside the DJ, turntablism, scratching, beatboxing, and instrumental tracks. Reggae came from Jamaica in the late 1960s, sung in Jamaican Patois, Jamaican English, and Iyaric dialects, with lyrics often raising political awareness. Bob Marley was honored at Zimbabwe's 1980 Independence celebration because his music inspired freedom fighters. Soca, the soul of calypso, was created by Ras Shorty I in Trinidad and Tobago in the 1970s to revive a fading calypso tradition.

  Rock music started as rock and roll in the United States in the late 1940s and early 1950s, branching into many styles by the mid-1960s. Heavy metal grew out of hard rock, psychedelic rock, and blues rock across the late 1960s and 1970s, with Black Sabbath, Judas Priest, and Motörhead. Its popularity soared in the 1980s through Iron Maiden, Metallica, and Guns 'n' Roses, splitting into thrash metal, hair metal, and death metal. Pop took its modern form in the mid-1950s across the United States and the United Kingdom. Soul gathered the pop R&B acts at Motown Records in Detroit, the Temptations, Gladys Knight & the Pips, Marvin Gaye, and Four Tops, beside deep soul singers like Percy Sledge and James Carr.

• 8. Who Likes What, And Why

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  Personality steers the dial. Listeners who think of themselves as rebels lean toward heavier styles like heavy metal or hard rock, while those who call themselves relaxed or laid back drift toward jazz or classical. One model proposes five genre-free factors behind preference, each tied to emotional response. The Mellow factor covers smooth, relaxing styles like jazz and classical. The Urban factor is rhythmic and percussive, holding rap, hip-hop, and funk. The Sophisticated factor takes in operatic and world music. The Intensity factor gathers the forceful and loud, rock and metal. The campestral factor holds singer-songwriter genres and country.

  The body and the calendar shape taste as much as identity does. Studies show women tend to prefer more treble oriented music while men prefer bass-heavy music, and a taste for bass-heavy music is sometimes paired with borderline and antisocial personalities. Age moves the needle too. A Canadian study found adolescents drawn to pop artists, while adults and the elderly preferred classic genres such as rock, opera, and jazz. As streaming through Spotify, iTunes, and YouTube widened access, more listeners began ranging across a broader span of styles than any single label could contain.