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Neo metal is a contemporary, hybrid branch of heavy music that fuses modern metal riffing and breakdown power with glossy, pop-aware songwriting and electronic production. It borrows the bounce and hip‑hop sensibility of late‑1990s/early‑2000s nu metal, the precision of metalcore and djent, and the synthetic textures of EDM, trap, and industrial. Hallmarks include down‑tuned 7–8‑string guitars, half‑time, groove‑led drums, sub‑heavy 808s, and an emotive vocal palette that shifts between screams, rap‑cadenced phrasing, and soaring pop choruses. Studio craft is central: sound design, side‑chained synths, layered vocals, and punchy, wide masters aim for festival‑scale impact while remaining radio/playlist friendly.

Glam metal (often called hair metal) is a flamboyant strain of 1980s hard rock and heavy metal defined by high-energy riffs, anthemic choruses, and glossy, radio-ready production. It pairs the swagger of hard rock with pop hooks, multi-tracked vocal harmonies, and virtuosic guitar solos. Visually, the style is theatrical: teased hair, makeup, spandex, and flashy stagewear echo the glam rock of the 1970s, while the music embraces both party-ready anthems and power ballads. The sound is big, bright, and built for arenas and MTV-era music television.

Speed metal is a fast, precision-driven branch of heavy metal that crystallized at the turn of the 1980s. It emphasizes aggressive tempos, tightly synchronized riffing, and virtuosic lead guitar work, while generally retaining melodic, often clean or strident vocals. Compared with thrash metal, speed metal tends to be less percussive and more melodic, favoring galloping rhythms, twin-guitar harmonies, and classic verse–chorus structures. Drums often employ rapid double-time feels and double-bass patterns, while bass frequently mirrors the rhythm guitar to reinforce propulsion. Lyrical themes range from rebellion and street realism to fantasy, warfare, and sci‑fi.

Pop metal is a radio-friendly strain of heavy music that blends the polish and hooks of pop with the guitar-driven power of hard rock and heavy metal. Characterized by anthemic choruses, glossy production, and melodic guitar solos, it favors catchy verse–pre‑chorus–chorus structures, harmonized vocals, and big, reverberant drums. The sound often employs layered rhythm guitars, high-gain yet smooth tones, and earworm toplines, while power ballads showcase cleaner guitars, keyboards, and soaring vocals. Visually and culturally, the style emerged alongside the glam/hair metal movement, leveraging MTV-ready aesthetics and crossover songwriting to reach mainstream audiences far beyond traditional metal scenes.

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.

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.