I.S.S.

Tokyo progressive/avant-garde metal quintet active since 1997, built around keyboardist Masashi Momota's sweeping piano work and vocalist Anoji Matsuoka's genre-hopping delivery, from spitting growls to a more crooned register. The band favors through-composed 'movements' over verse-chorus form, blending death metal weight with jazz and fusion harmony; their 2005 sophomore album Naishikyo-Sekai reached the West via a 2008 Season of Mist reissue. Early drummer Junichi Harashima left the band (replaced by Gaku Yamaguchi around 2006) to become the longtime drummer of fellow Japanese avant-garde metal act Sigh.

無下の人 (Muge No Hito / The Free Man)play in the dock

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Haarlem sextet Schizoid Lloyd builds bombastic, theatrical prog-metal from Queen-style vocal-harmony bombast, Zappa-esque guitar knots, and a Mr. Bungle-indebted carnival-barker sense of humor, with reviewers also flagging touches of death-metal snarl (comparisons to Gorguts) and hip-hop-informed production quirks. Formed in 2007 and eventually signed to Blood Music in 2014, the band's catalog runs from two early EPs (Virus, Circus) to their sole full-length, The Last Note in God's Magnum Opus (2014).

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Mats/Morgan is a Swedish avant-fusion duo of keyboardist Mats Öberg (blind since birth) and drummer Morgan Ågren, playing together since the early 1980s. Their music is a hyper-virtuosic, genre-splicing brew of jazz fusion, avant-prog, free improvisation, electronica and modern classical, delivered with a mischievous sense of humor. Discovered as teenagers by Frank Zappa after he heard them perform in Stockholm in 1988, the pair went on to appear in his Zappa's Universe projects and have recorded prolifically for Cuneiform Records.

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Mondo Cane is Mike Patton's orchestral love letter to 1950s–60s Italian pop, assembled after his years living in Bologna: a 40-piece orchestra, 15-piece band, and choir behind Patton crooning Neapolitan standards and Ennio Morricone's 'Deep Down', released on his own Ipecac label in 2010. Co-produced and arranged with conductor Daniele Luppi, the recordings were stitched together from live European performances in 2007. It earns its place in an experimental metal atlas as the purest example of where the genre's members go when they leave metal entirely — the Faith No More and Mr. Bungle frontman trading screams for Morricone-era orchestration, and critics compared it favorably to Mr. Bungle's California.

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Cosa Brava is an experimental rock and free improvisation group formed in March 2008 in Oakland, California, by guitarist and composer Fred Frith (Henry Cow, Skeleton Crew, Naked City). All About Jazz described their sound as existing somewhere between folk, Celtic, modern chamber, Latin, funk, Eastern, and prog-rock. The quintet released Ragged Atlas (2010) and The Letter (2012) on Switzerland's Intakt Records, followed by Z Sides (2024). Its lineup draws together members of Sleepytime Gorilla Museum with longtime Frith collaborator Zeena Parkins.

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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One-man Vienna-based experimental progressive metal project helmed by David Angerer, whose 2026 album Palingenaeon plays like 'a film score at a party' -- neoclassical/symphonic prog metal stitched together with circus music, absurdist black comedy, and a loose concept about botched reincarnation. Extremely new and thinly documented outside a handful of prog/metal press write-ups.

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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Oh. is the solo moniker of Greek multi-instrumentalist, composer, and director Olivia Hadjiioannou, who writes, performs, records, and mixes every part of her music herself. Her instrumental progressive-metal EP Metallia (self-released, July 2018) is a six-part concept work built from layered electric/acoustic guitars, violin, keyboards, and shifting time signatures; its 'Red Lion' music video won Best Music Video at multiple festivals, including the French Riviera Film Festival in Cannes.

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Don Salsa was an experimental avant-prog/avant-metal band formed in 1993 while its members were in high school in the South Bay region of Los Angeles, active until 1997. The band recorded a single album, 'Koolaide Moustache in Jonestown,' released May 21, 1997, recorded over nearly three years in a warehouse on a primitive digital multi-track recorder, with an opening track exceeding 30 minutes. Core members Tim Smolens and Jason Schimmel went on to form Estradasphere, and Schimmel later became a founding member of Atomic Ape and an active member of Secret Chiefs 3.

Koolaide Moustache in Jonestown [Full Album]play in the dock

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