Ahleuchatistas

Neuma emerged in 2001 from the ashes of Polish prog/noise-metal cult act Kobong, and by 2006's 'Weather' had built a sound around crushing, djent-like bass vamps under free-jazz saxophone improvisation. Reviewers compare its skronking, Colin Stetson-esque sax runs to a slow-motion 'jazz drone,' with fuzzy guitars splitting the difference between post-punk and post-hardcore. It reads as a sparser, stranger cousin to the metal/jazz-fusion lineage of bands like Estradasphere.

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The Pitts Minnemann Project is an instrumental progressive-rock/jazz-fusion collaboration between keyboardist Jimmy Pitts (Scholomance) and drummer Marco Minnemann, joined by rotating guest virtuosi on guitar, bass, saxophone, and violin. They released two albums, '2 L 8 2 B Normal' (2014) and 'The Psychic Planetarium' (2016), both blending heavy fusion with progressive-metal complexity.

Blind Idiot God is an instrumental trio formed in 1982 in St. Louis, fusing noise rock, dub, funk, free jazz and metal; Greg Ginn signed them to SST Records after hearing their demo. Their 1988 album Undertow was produced by Bill Laswell and featured saxophonist John Zorn, and the full band performed on Laswell's Praxis album Sacrifist (1993) alongside Buckethead, Bootsy Collins and Yamatsuka Eye. Khanate drummer Tim Wyskida joined in 2001 and remains the band's drummer through their 2015 reunion album Before Ever After.

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Brooklyn/NYC instrumental trio blending prog, jazz, and metal into knotty, polymetric compositions; began as an acoustic jazz unit before electrifying into an aggressive math-rock/tech-metal power trio. Drummer Jeff Eber doubles in Dysrhythmia, and the band's Cuneiform-era records were engineered by Dysrhythmia's Colin Marston, tying them into the Brooklyn tech-metal underground.

Cartel Carnage is a French quintet of jazz-scene musicians (guitar, bass, trumpet, tenor sax, drums) fusing free jazz, heavy metal, pop and progressive rock into what reviewers called a 'musical UFO.' Their sound and stated influences — Naked City, Fantomas, Mr. Bungle, Zorn, Ornette Coleman, alongside Meshuggah and Slayer — place them squarely in genre-collision RIO/avant-prog territory, though no sourced personnel or label ties connect them to the existing atlas. Their sole full-length, Incorporated, was released in 2012 on Great Winds/Musea Records.

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Volto! is an American jazz-fusion jam band based in Los Angeles, best known as the side project of Tool drummer Danny Carey. Formed in the early 2000s from improvised sessions with guitarist John Ziegler and bassist Lance Morrison at a San Fernando Valley jazz club, the group spent nearly a decade as a live-only act before releasing its debut album Incitare (2013) on Fantasy Records. Their heady, genre-spinning instrumental sound bridges King Crimson, Liquid Tension Experiment, and 1970s fusion, foregrounding the improvisation that Carey has cited as his main motivation for the project.

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Los Angeles metal-jazz quartet fronted by trumpeter Dan Rosenboom and guitarist Jake Vossler, pairing lyrical, Miles-Davis-lineage trumpet against Vossler's distorted, noise-inflected guitar over double bass and drums. Their 2017 debut Reclamation (Tzadik) was tracked in 72 hours as a politically charged 'jazz protest record,' moving between free improvisation, heavy thrash riffing, and balladic passages.

Titan to Tachyons is a New York instrumental quartet led by guitarist Sally Gates, built around a two-bassist frontline (Trevor Dunn and Matt Hollenberg) with drummer Kenny Grohowski, fusing free-jazz improv, prog counterpoint, and metal violence into sci-fi-themed instrumentals. Their 2022 album Vonals was released on John Zorn's Tzadik label (following 2020's Cactides on Nefarious Industries), and the polyrhythmic, two-bass arrangement gives the compositions an unusually dense, contrapuntal low end. Every member's other credits (Mr. Bungle, Fantômas, Tomahawk, Secret Chiefs 3, Cleric, Imperial Triumphant) wire this band into the Zorn/downtown-jazz and Patton-adjacent avant-metal orbit.

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Trevor Dunn's Trio-Convulsant is the avant-garde jazz vehicle of Mr. Bungle bassist Trevor Dunn, active since 1997 and built on the idea of a compositional jazz trio that also wields rock's power chords — AllMusic called the result "moody jazz with convulsive rock." The group debuted with Debutantes & Centipedes (1998, Buzz Records) featuring guitarist Adam Levy and drummer Kenny Wollesen, then re-emerged on Ipecac with Sister Phantom Owl Fish (2004) in a new lineup with guitarist Mary Halvorson and drummer Ches Smith. That trio returned on Séances (2022, Pyroclastic Records), expanded by the chamber quartet Folie à Quatre — including Sleepytime Gorilla Museum violinist Carla Kihlstedt — for music inspired by the 18th-century French Convulsionnaires of Saint-Médard.

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Lye by Mistake were an instrumentally virtuosic experimental metal band from St. Louis, Missouri, active 2004-2011, who moved from vocal mathcore on their 2006 debut Arrangements for Fulminating Vective to fully instrumental jazz-fusion metal on 2009's Fea Jur after vocalist Tony Saputo's 2008 departure. Reviewers likened their guitar work to jazz-fusion players like Pat Metheny and Al Di Meola grafted onto a Meshuggah-indebted metal chassis. They toured alongside mathcore-scene peers including Psyopus, The Number Twelve Looks Like You, Cattle Decapitation, and Arsonists Get All the Girls.

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