Afterbirth

New Wave of OSDM (Old School Death Metal) is a 2010s–present revival movement that resurrects the aesthetics, riffcraft, and production ethos of late-1980s/early-1990s death metal. It favors down‑tuned guitars, chromatic riffing, guttural vocals, and an organic, unpolished sound that feels tactile and oppressive rather than hyper‑edited. Stylistically it triangulates the Floridian school’s technical menace, the Incantation/Autopsy murk and doom-laden crawl, and the Swedish HM‑2 “buzzsaw” bite—often within the same album. Songs pivot between d‑beat churn, mid‑paced stomps, lurching death‑doom passages, and short blasts, with bass prominent in the mix and drums captured with room ambience. Lyrically and visually, the movement leans on cosmic horror, rot, mysticism, war, and underground tape‑trader aesthetics, sustained by DIY labels and a thriving cassette/vinyl culture. Rather than museum‑piece nostalgia, the scene treats classic techniques as living practice: updating arrangement flow, atmosphere, and harmonic color while preserving the genre’s primal heft.

Cavernous death metal is a murky, reverb-drenched strain of old-school death metal that foregrounds claustrophobic atmosphere over clinical precision. Hallmarks include extremely downtuned guitars, tremolo-picked and chromatic riffing, lurching doom-laden passages, and very deep, often indecipherable guttural vocals. Production aesthetics are central: drums are thunderous yet blurred, guitars and bass form a monolithic wall of low-end, and large-room or plate reverbs smear the mix to evoke the feeling of sound emanating from a subterranean chamber. Rather than bright, high-fidelity tones, the style prefers darkness, distance, and density—suggesting sinister space, decay, and ancient dread. Compositionally it draws on early 1990s death and death-doom blueprints, but the 2010s revival codified the "cavernous" sound as a distinct aesthetic, emphasizing mood, negative space, and oppressive resonance as much as riffcraft.

Cosmic death metal is a branch of death metal that fuses technical and progressive riffcraft with space‑oriented atmospheres and science‑fiction thematics. Musically, it combines the heft and speed of classic death metal with expansive, reverb‑drenched leads, layered synths or guitar textures evocative of deep space, and frequent metric and harmonic shifts. Lyrically, it explores cosmology, extraterrestrial life, cosmic horror, and metaphysical themes. The result is a sound that feels both crushingly physical and vast, often alternating between precision blast‑beat assaults and weightless, ambient or psychedelic passages that suggest starfields and voids.

Progressive metal blends the ambition and extended song forms of progressive rock with the heaviness, timbre, and energy of heavy metal. It is characterized by complex arrangements, frequent time‑signature changes, virtuosic instrumental passages, thematic or concept‑driven albums, and a wide dynamic range from delicate, atmospheric sections to aggressive, high‑gain climaxes. Harmonically it draws on modal interchange, chromatic voice‑leading, and jazz‑fusion colors, while rhythmically it favors polymeters, polyrhythms, and metric modulation. Keyboards and layered production often add orchestral or cinematic scope.

Heavy metal is a loud, guitar-driven style of rock defined by heavily distorted riffs, thunderous drums, and powerful vocals. Its musical language emphasizes minor modes, modal (Aeolian, Phrygian) riffing, and energy over groove, often featuring virtuosic guitar solos and dramatic dynamic contrasts. Emerging from late-1960s blues rock and psychedelic experimentation, heavy metal codified a darker, heavier sound with bands like Black Sabbath, Deep Purple, and Led Zeppelin. The genre values weight, intensity, and grandeur—whether through plodding, doom-laden tempos or galloping, high-energy rhythms—paired with themes that range from personal struggle and social critique to fantasy, mythology, and the occult.

Rock is a broad family of popular music centered on amplified instruments, a strong backbeat, and song forms that foreground riffs, choruses, and anthemic hooks. Emerging from mid‑20th‑century American styles like rhythm & blues, country, and gospel-inflected rock and roll, rock quickly expanded in scope—absorbing folk, blues, and psychedelic ideas—while shaping global youth culture. Core sonic markers include electric guitar (often overdriven), electric bass, drum kit emphasizing beats 2 and 4, and emotive lead vocals. Rock songs commonly use verse–chorus structures, blues-derived harmony, and memorable melodic motifs, ranging from intimate ballads to high‑energy, stadium‑sized performances.