Enthusiasts of wrecked music groups such as Sun Ra and his Intergalactic Research Arkestra, The Residents, and Mr. Bungle might take issue with the “weirdest band in the world” moniker that has been bestowed upon Negativland by bloggers, music critics and left-of‑field sonic screwballs. Calm down, avant-garde heads. No need to go message-board aggro. Consider this: Formed in Concord, California, in 1979, the band makes and plays antiquated homemade analog feedback devices called Boopers. On top of the Boopers’ ridiculous noise shrapnel, the band cuts up analog tape recordings of spoken-word/talking humans (such as former American Top 40 host Casey Kasem) and repurposes them to the delight/not delight of fans/not fans. The not-delight/not-fans category includes U2 (via Island Records) and Greg Ginn’s SST Records, which has sued Negativland for copyright infringement. In other words, they present forward-thinking sounds and visual art that sometimes requires a legal defense. Negativland Live! — made possible by Aurora Picture Show, The Art Guys and D.M. Allison Art — features these freaks, alongside electronic musician Woobly and video artist Steev Hise, debuting select musical pieces in a live context.