Amalgamation of elements of jazz tradition (especially free jazz and jazz fusion of 60s-70s) with instrumentation/concepts of avant punk rock (especially dissonant strains, no wave, grindcore, hardcore). Examples: John Zorn, Bill Frisell, Fred Frith, James Chance & the Contortions, Lounge Lizards. Roots of punk: Velvet Underground, Stooges, MC5. Roots of avant/free jazz: Albert Ayler, Archie Shepp, Roscoe Mitchell, Sonny Sharrock.