Math Metal
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Rhythm-obsessed metal built on polymetric riffing — a repeating odd-length guitar/kick pattern cycling against a steady backbeat so the groove constantly shifts phase before resolving. Hallmarks are syncopated, palm-muted low-string chugs, frequent meter changes, dissonant angular chords and start-stop dynamics, played with machine-tight precision and often on down-tuned seven/eight-string guitars. Vocals range from harsh barks to clean shouts; the mood is mechanical, disorienting and cerebral, prizing rhythmic puzzle-craft over melody or speed.
History
Sweden's Meshuggah are the foundational act: from 'Destroy Erase Improve' (1995) through 'Chaosphere' (1998) and the monolithic 'Bleed' on 'obZen' (2008) they codified the long polymetric phrase and the eight-string, drop-tuned palm-mute that the whole style orbits. The early-2000s UK scene around Watford's SikTh ('The Trees Are Dead & Dried Out…', 2003; 'Bland Street Bloom' on 'Death of a Dead Day', 2006) added dual-vocal acrobatics, while New York's Car Bomb welded Meshuggah math to mathcore aggression on 'Centralia' (2007). The Netherlands' Textures and a wave of Sumerian/Basick-era bands carried it forward; its rhythmic vocabulary fed directly into djent (Periphery, TesseracT) while staying distinct from the melodic-prog mainstream.
Defining artists
Essential listening
Sources
- Wikipedia: Meshuggah
- 'obZen'
- SikTh
- Car Bomb
- Textures
- ProgArchives / Encyclopaedia Metallum entries for Meshuggah, SikTh and Car Bomb
- Revolver 'Inside obZen' feature
- MetalSucks coverage of Meshuggah's polymetric style