Hasegawa, Hiroshi

Harsh noise wall (often abbreviated HNW) is an extreme substyle of noise that focuses on producing a monolithic, static "wall" of sound with virtually no perceivable change over long durations. The texture is typically broadband, high-gain, and unrelentingly loud, emphasizing sheer density and timbral grain over dynamics, rhythm, or melody. Aesthetically, HNW tends toward minimalism and austerity: the piece begins and, for the most part, remains the same until it ends. This reduction of musical events is intentional, directing the listener’s attention to micro-level fluctuations in the sound mass, bodily perception, and the temporal experience of endurance. Releases are commonly issued in long-form formats and often feature stark visual presentation and conceptual themes of anonymity, erasure, or anti-performance.

Noise is an experimental music genre that uses non-traditional sound sources, distortion, feedback, and extreme dynamics as primary musical materials. Instead of emphasizing melody, harmony, or conventional rhythm, it focuses on texture, density, timbre, and the physical presence of sound. Practitioners sculpt saturated walls of sound, piercing feedback, metallic clatter, contact-mic scrapes, tape hiss, and electronic interference into works that can be confrontational or meditative. Performances often highlight process and immediacy—improvisation, body movement, and site-specific acoustics—while recordings can range from lo-fi cassette overload to meticulously layered studio constructions. Though rooted in early avant-garde ideas, the genre coalesced as a distinct practice in the late 1970s and 1980s, especially through Japan’s ‘Japanoise’ scene, and subsequently influenced numerous styles across industrial, punk-adjacent, and experimental electronic music.

Electronic is a broad umbrella genre defined by the primary use of electronically generated or electronically processed sound. It encompasses music made with synthesizers, drum machines, samplers, computers, and studio/tape techniques, as well as electroacoustic manipulation of recorded or synthetic sources. The genre ranges from academic and experimental traditions to popular and dance-oriented forms. While its sonic palette is rooted in electricity and circuitry, its aesthetics span minimal and textural explorations, structured song forms, and beat-driven club permutations. Electronic emphasizes sound design, timbre, and studio-as-instrument practices as much as melody and harmony.