Bengt Berger

Free jazz is a radical branch of jazz that rejects fixed chord progressions, strict meter, and conventional song forms in favor of collective improvisation, textural exploration, and spontaneous interaction. Musicians prioritize timbre, dynamics, and gesture as much as pitch and harmony, often using extended techniques (multiphonics, overblowing, prepared piano) and unconventional sounds. While rooted in the blues and earlier jazz vocabularies, free jazz frees improvisers from pre-set harmonic cycles, allowing lines to unfold over tonal centers, shifting modes, drones, or complete atonality. Rhythm sections may float without a steady pulse, or drive with layered polyrhythms and “energy playing.” The result ranges from contemplative soundscapes to cathartic, high-intensity eruptions. Culturally, the genre intersected with the civil rights era and broader avant-garde movements, emphasizing autonomy, community, and new possibilities for musical expression.

Afro-jazz is a fusion genre that blends the improvisational language, harmony, and ensemble practices of jazz with the rhythmic vocabulary, grooves, and timbral palette of African musical traditions. Characterized by polyrhythms, cyclical vamps, call-and-response, and prominent percussion, Afro-jazz often features horn sections and keyboards (piano or electric piano) articulating jazz harmonies over dance-oriented African grooves. The result ranges from intimate, melodic pieces to high-energy, club-ready performances. While it developed across several African locales, the South African "African jazz" movement of the 1950s—rooted in marabi and kwela—was especially formative, as were contemporaneous West African fusions of highlife and jazz.