Effluence

Agabas is a six-piece 'deathjazz' band formed in Trondheim, Norway, fusing death metal aggression with jazz harmony and improvisation, anchored by saxophonist Alexander Dellerhagen alongside a full metal rhythm section. Several members hold jazz performance master's degrees, and press coverage draws comparisons to Meshuggah, The Dillinger Escape Plan, and Gojira crossed with John Coltrane and Ornette Coleman. The band signed to Mascot Records around their 2025 album Hard Anger.

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ByoNoiseGenerator are a five-piece avant-garde/brutal death metal and deathgrind band from Perm, Russia, formed in 2014, built around a dedicated saxophone player alongside the standard metal lineup. Their three LPs (Turbulent Biogenesis 2015, Neuromechanica 2018, Subnormal Dives 2025) blend insanely technical grindcore with freeform jazz, funk (Primus-style) guitar work and drum-and-bass detours. Subnormal Dives (2025) drew coverage from Angry Metal Guy, The Progressive Subway and Everything Is Noise for this jazz/deathgrind hybrid.

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Long-running Indonesian band from Yogyakarta, formed 1998, that started as avant-garde/technical death metal and by their 2009 album 'Lipan's Kinetic' had shifted toward a free-jazz-influenced mathcore style, incorporating clean jazz guitar passages, electronic/dubstep digressions, and even a straight-faced Cure cover ('Friday I'm In Love') alongside brutal death metal riffing. Reviewers have likened the results to 'a collaboration between John Zorn and Melt-Banana' and to Psyopus-style mathcore fused with brutal death metal. Current lineup is Halim (guitars, since 1998), Mal (bass, since 2001), Didit (vocals, since 2002) and Obet (drums, since 2006).

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Brain Tentacles is a Chicago trio formed in 2013: Bruce Lamont (Yakuza, Bloodiest) on saxophone, electric piano, synth and voice; Dave Witte (Discordance Axis, Municipal Waste) on drums; and Aaron Dallison (Keelhaul) on bass and synth. Their 2016 self-titled debut (Relapse Records) swings between 'mathy chaos' and 'juddering grooves,' drawing direct comparisons to John Zorn's Naked City, with a guest vocal spot from Eugene Robinson (Oxbow), production by Sanford Parker, and cover art by Jef Whitehead (Leviathan).

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Killing Spree is a French avant-jazz/death-metal duo of saxophonist Matthieu Metzger (Klone, Orchestre National de Jazz) and drummer Grégoire Galichet (Deathcode Society, Kwoon), formed after the pair met on a tour of Japan. Their 2020 debut EP A Violent Legacy reworked Death and Meshuggah tracks through saturated free-jazz saxophone and talkbox, and their 2024 full-length Camouflage (Klonosphere/Season of Mist) pushes further into technical, hardcore-adjacent death-metal-via-jazz territory. Not to be confused with several unrelated straight thrash-metal bands of the same name.

The Dr. Orphyus Project is the solo vehicle of Ryan Morris, a death-metal/jazz-fusion outfit based in Clay City, Illinois and active since 2001 (per Metal Archives) with a discography running from the 2001 self-titled EP through 2011's Death Jazz and 2016's The Roustabout. Morris plays guitar, trombone, and vocals, weaving swing, Latin, grind, and even polka passages into extreme-metal songwriting, citing Mr. Bungle and Agoraphobic Nosebleed as touchstones. Comic-book concept releases (the Death Nouveau series) and an animated Death Jazz feature underline the project's theatrical, genre-scrambling bent.

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Orgone is a Pittsburgh, Pennsylvania avant-garde extreme-metal band formed in 2006, beginning as a technical deathgrind outfit (Accumulator, The Goliath) before drifting toward a genre-agnostic progressive death sound. The Joyless Parson (recorded 2008, released 2014) and Pleroma (2024) fold acoustic/chamber instrumentation, cello, jazz voicings and post-metal atmosphere into their knotty tech-death, with the band openly describing itself as unclassifiable. It stands as a cult, self-releasing act on the experimental fringe of American death metal.

Dysrhythmia is an instrumental progressive/technical metal trio formed in Philadelphia in 1998 by guitarist Kevin Hufnagel and drummer Jeff Eber, now based in Brooklyn. Bassist Colin Marston — also of Krallice, Behold...The Arctopus, and the reunited Gorguts — joined in 2004, and the band's eight studio albums fuse jazz-inflected chord work, technical/progressive-death riffing, and prog-rock structure into a wordless, largely live-tracked instrumental attack.

Testament are a Bay Area thrash metal band formed in Berkeley in 1983 (as Legacy, renamed Testament in 1986), long regarded as one of the leading second-wave thrash acts alongside the genre's 'Big Four.' Built around constants Chuck Billy (vocals) and Eric Peterson (guitar), with jazz-trained lead guitarist Alex Skolnick, they broke out with The Legacy (1987) and Practice What You Preach (1989) before pushing into heavier, death-metal-inflected territory on Low (1994) and Demonic (1997). Drummer Gene Hoglan — also of Strapping Young Lad, Dark Angel and Death — anchored the band from 2011 to 2022, recording Brotherhood of the Snake (2016) and Titans of Creation (2020) and becoming their longest-serving drummer.

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Eigenstate Zero is the solo project of Stockholm metal veteran Christian Ludvigsson, launched in 2018 to fuse progressive death metal with Frank Zappa-style jazz-fusion excess. Across Sensory Deception, Machinery of Night, The Malthusian and Shape of God Thought of Sun, Ludvigsson stacks odd time signatures and weird electronic/synth textures over a death-metal chassis, filling 'passages of eclectic weirdness' between the heavy sections.

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