Neuma

Ahleuchatistas are an American instrumental avant-prog / math rock group formed in Asheville, North Carolina, in November 2002, mixing jazz, progressive rock, noise, African and Chinese traditional music into block-form, thru-composed and improvised pieces. Their name fuses Charlie Parker's 'Ah-Leu-Cha' with the Zapatistas. Their 2004 album The Same and the Other was reissued on John Zorn's Tzadik in 2008 after Zorn took interest, and the current lineup pairs founder Shane Parish with bassist Trevor Dunn.

Black Engine is a one-off 2007 Italian collaboration uniting three members of experimental jazzcore trio Zu - Luca T. Mai (baritone/alto sax), Massimo Pupillo (bass) and Jacopo Battaglia (drums) - with guitarist/producer Eraldo Bernocchi. Their sole album, 'Ku Klux Klowns' (Wallace Records, 2007), pushes Zu's usual free-jazz/noise-rock language into heavier, doom-drone-adjacent territory with Bernocchi's guitar riffing layered atop the horn-led chaos. The project effectively works as a heavier-guitar-driven Zu side outlet and presaged Bernocchi and Pupillo's later duo Obake.

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.

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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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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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.

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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Tear Light From Matter is a Massachusetts-based instrumental act pairing saxophone with a standard metal rhythm section, self-tagged on Bandcamp as experimental/jazz metal/fusion/prog metal. Their debut, "In Statu Nascendi" (released 25 January 2019, recorded and mixed by Jerry MacDonald at Odd Fellows Recording), sits alongside a further release, "Fœtal Præyers", in a small but pointed discography. The saxophone-led interplay places them in the lineage of jazz-inflected heavy bands rather than straightforward metal songwriting.

Red Side Visible is a Cleveland/Akron, Ohio project built around multi-instrumentalist Tim Mirth, fusing odd-metered metal riffing with genuine free-jazz improvisation and alto saxophone. Press copy invokes Meshuggah, Mr. Bungle and Zappa as touchstones; the 2021 album 'A Break from Normality' collects material written and re-recorded across a decade since the project's 2010 debut 'Enter Entropy'.

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.