Rounder Select

Bluegrass is a style of American roots music that coalesced in the Appalachian region in the 1940s around Bill Monroe and his Blue Grass Boys. It is defined by all‑acoustic instrumentation (typically fiddle, mandolin, 5‑string banjo, guitar, and upright bass, with dobro often added), virtuosic ensemble interplay, and a distinctive “high lonesome” lead vocal timbre supported by tight three‑part harmonies. Musically, bluegrass fuses African American blues and jazz phrasing with Anglo‑Celtic ballads and dance tunes. Hallmarks include driving tempos, syncopated 3‑finger banjo rolls (popularized by Earl Scruggs), off‑beat mandolin “chop” backbeats, boom‑chuck guitar rhythm, two‑beat bass, and alternating instrumental “breaks.” Repertoires mix breakdowns and fiddle tunes with narrative ballads, gospel numbers, and contemporary songwriter material.

Cajun is the dance-driven traditional music of the Francophone Cajuns of south Louisiana, characterized by driving two-steps, lonesome waltzes, and heartfelt, often nasal-tinged vocals sung in Cajun French and English. Its core sound blends button accordion and fiddle, propelled by guitar, bass, and the metallic pulse of the triangle (tit-fer). Built for social dancing in packed halls, the music emphasizes strong melodic hooks, call-and-response refrains, and sturdy rhythms. Repertoires include up-tempo two-steps in duple meter and lyrical waltzes in triple meter, with instrumental breaks that showcase the accordion’s bellows phrasing and the fiddle’s double-stops and slides. Over time, Cajun incorporated elements from country, blues, and swing while retaining a distinct regional identity.

Cape Breton fiddling is a vigorous Scottish-Gaelic–rooted violin tradition from Cape Breton Island in Nova Scotia, Canada. It is best known for driving dance rhythms, pipe-influenced ornaments, and distinctive piano accompaniment that propels step dancing. Typical sets string together marches, strathspeys, reels, and jigs, often moving from a measured stride to high-energy dance tunes. Hallmarks include the strathspey’s “Scotch snap,” pulsing bow accents, crisp articulation for dancers, modal tonalities (especially mixolydian and dorian), and robust left-hand/bass-run piano vamps that mirror Highland pipe and dance band grooves.

Country is a roots-based popular music from the rural American South that blends Anglo-Celtic ballad traditions with African American blues, gospel, and string-band dance music. It is characterized by narrative songwriting, plainspoken vocals with regional twang, and a palette of acoustic and electric instruments such as acoustic guitar, fiddle, banjo, pedal steel, and telecaster guitar. Rhythmically it favors two-step feels, train beats, shuffles, and waltzes, while harmony is largely diatonic (I–IV–V) with occasional country chromaticism and secondary dominants. Across a century, country has evolved through substyles like honky-tonk, the Nashville and Bakersfield sounds, outlaw country, neotraditionalist revivals, pop-country, and country-rap hybrids, but it consistently prioritizes storytelling about everyday life, love, work, faith, place, and identity.

Folk is a song-centered acoustic tradition rooted in community storytelling, everyday life, and social history. It emphasizes clear melodies, simple harmonies, and lyrics that foreground narrative, protest, and personal testimony. As a modern recorded genre, folk coalesced in the early-to-mid 20th century in the United States out of older ballad, work song, and rural dance traditions. It typically features acoustic instruments (guitar, banjo, fiddle, mandolin, harmonica), strophic song forms, and participatory singing (choruses, call-and-response).

Old-time is a North American string-band tradition rooted in the rural South and Appalachia, where fiddles and banjos lead dance tunes, ballads, and breakdowns. It emphasizes a steady, trance-like groove for social dancing, ensemble playing over solos, and strong melodic riffs supported by drones and rhythmic ostinati. The sound blends British Isles balladry and fiddle repertory with African American banjo technique and rhythmic sensibilities. Tunes are commonly modal (Dorian, Mixolydian, Aeolian), arranged in two repeated strains (AABB), and played for extended durations to serve square and contra dancing. Vocals, when present, are often old ballads or topical songs delivered with a plain, direct style.

Progressive folk is a strand of folk music that adopts the exploratory spirit, extended forms, and harmonic richness of progressive rock and jazz while remaining rooted in traditional songcraft and acoustic timbres. It favors modal melodies, intricate fingerpicking, and unusual time signatures, often weaving together British and Celtic folk idioms with classical and jazz-informed arrangements. Compared with straight folk or folk rock, progressive folk is more ambitious in structure: suites, long-form ballads, and thematic albums are common. Lyrically it ranges from pastoral and mythical to philosophical and introspective, and it frequently experiments with instrumentation (e.g., dulcimer, sitar, harp, early music winds) and layered vocal counterpoint. The result is music that feels both ancient and modern—earthy yet expansive.

Son montuno is a seminal variant of Cuban son distinguished by its extended montuno section: a vamp-based, call-and-response passage that spotlights coro–pregón vocals, cyclical piano or tres guajeos, and a propulsive rhythm section centered on the son clave. Compared with earlier septeto son, son montuno adopts a fuller conjunto format (trumpets, piano, conga added to bongó, maracas, claves, bass, and tres), thicker horn riffs, and more syncopated tumbaos. It balances a lyrical, narrative verse (canto or verso) with a highly danceable, improvisatory montuno, making it the bridge between rural son traditions and later big-band and urban Afro‑Caribbean dance styles.