NieR:Automata (Original Soundtrack)

Fourth World is a term coined by trumpeter-composer Jon Hassell to describe a "unified primitive/futuristic sound" that blends ambient minimalism, non-Western traditional musics, and studio electronics into an imagined global music. The style is characterized by modal drones, cyclical hand percussion, and timbral experimentation (often through harmonizers, delays, and pitch-shifting) applied to acoustic instruments—famously Hassell’s processed trumpet—alongside sampled or evoked elements of African, Indian, Southeast Asian, and other traditions. Rather than ethnographic authenticity, Fourth World proposes an imaginative, post-geographic sound world where the studio acts as a cultural crossroads. Musically it favors slow to mid tempos, layered polyrhythms, pentatonic or raga-like modality, microtonal color, spacious reverbs, and textural foregrounding. The result is meditative and sensuous, at once ancient-sounding and hyper-modern.

Experimental electronic is an umbrella term for electronic music that foregrounds exploration and innovation over convention. It treats the studio, computer, and synthesizer as laboratories, using techniques such as tape manipulation, modular and software synthesis, feedback systems, granular and spectral processing, algorithmic/generative composition, circuit-bending, and field recording. Rather than regular song forms or dancefloor functionality, it prioritizes timbre, texture, space, and process. Structures may be nonlinear or open-form; harmony is often non-functional or drone-based; rhythm can be free, irregular, or machine-deconstructed. The style overlaps with electroacoustic music, sound art, industrial, ambient, and noise while continually interfacing with club culture and contemporary art contexts.