Psalm 88

Ambient noise wall (ANW) is a microgenre of noise music that blends the monolithic, unchanging "wall" aesthetics of harsh noise wall with the hushed, enveloping qualities of ambient and drone. Instead of abrasive, high-intensity textures, ANW typically presents a subdued, steady-state roar, hush, or rumble that remains largely static over long durations. The focus is on immersion, timbral depth, and the perception of minute internal movements within an ostensibly unvarying sound mass. Dynamics are minimal, rhythm and melody are absent, and pieces often run for extended lengths, encouraging deep listening and spatial awareness. Typical sources include filtered white/pink/brown noise, room tone, tape hiss, HVAC hums, and distant environmental recordings—shaped with narrow EQ bands, gentle saturation, and compression to form a soft yet impenetrable “wall.” Releases often appear on cassette/CDr with minimalist artwork to reinforce the austere, environmental character of the music.

Black metal is a form of extreme metal defined by fast tempos, tremolo‑picked guitar lines, blast‑beat drumming, shrieked or rasped vocals, and a deliberately raw, icy production aesthetic. Harmonically, it favors minor and modal collections (especially Aeolian and Phrygian), open-string drones, parallel fifths and fourths, tritones, and sparse or suspended chord voicings over blues-derived harmony. Arrangements often employ layered guitars, long-form song structures, and enveloping reverb to create a bleak, otherworldly atmosphere. The genre’s visual and thematic language is equally distinctive: corpse paint, monochrome artwork, and lyrics exploring anti-dogma, nature, pagan myth, cosmic nihilism, and misanthropy. While some scenes have been associated with controversy and extremism, the musical identity centers on sound, atmosphere, and aesthetics rather than any single ideology.

Harsh noise is an extreme form of noise music characterized by dense, high-volume, full-spectrum distortion that largely rejects melody, harmony, and conventional rhythm. It focuses on texture, saturation, and the psychoacoustic impact of sound. Rather than songs, works are often evolving blocks of feedback, amplified object sounds, and overloaded electronics, shaped into walls, bursts, or streams of sonic pressure. The aesthetic foregrounds physical intensity, unpredictability, and timbral complexity, often presented at ear-splitting sound-pressure levels. Although related to industrial and power electronics, harsh noise minimizes the role of beat and voice, emphasizing raw noise generation and continuous timbral sculpting. The scene is deeply DIY, thriving on small-run tapes, CDrs, and underground performance spaces.

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.

Martial industrial is a post-industrial style that fuses the aesthetics and percussion of military and parade music with the textures of industrial, dark ambient, and neoclassical dark wave. It is characterized by bombastic snare rolls, timpani and drumline patterns, fanfare-like brass or string stabs, and sample-based collages drawn from archival speeches, radio broadcasts, and wartime soundscapes. The genre often emphasizes processional rhythms in 2/4 or 4/4, deliberately repetitive arrangements, and a cinematic, historical atmosphere. Harmonic content tends to be minor-key and modal, favoring sombre chorales, orchestral pads, and choral samples. While the sound can be imposing and epic, many works also explore reflective or elegiac moods tied to memory, ruins, and the passage of time.

Metal (often used to mean heavy metal in its broad, umbrella sense) is a loud, guitar-driven style of rock defined by high-gain distortion, emphatic and often martial rhythms, and a dense, powerful low end. It foregrounds riff-based songwriting, dramatic dynamics, virtuosic guitar solos, and commanding vocals that range from melodic wails to aggressive snarls and growls. Harmonically, metal favors minor modes, modal color (Aeolian, Phrygian), chromaticism, and tritone-inflected tension, while thematically it explores power, mythology, the occult, social critique, fantasy, and existential subjects. While adjacent to hard rock, metal typically pushes amplification, distortion, precision, and thematic intensity further, forming a foundation for many specialized subgenres.