Since BJM formed in 1990, the band’s had fortysomething members come and go while making 11 studio albums, seven EPs, two live and four compilation records, and 15 singles. At a live show, you never know which version of the group you’re gonna get—the neopsychedelic, the moody folk or country blues, the shoegaze, or, after 2010’s Who Killed Sgt. Pepper?, the retro-electronic. The only consistency is the band’s one constant member, Anton Newcombe. The capricious king of asshole geniuses never fails to deliver a wildly unpredictable performance. (Neptune Theatre, 1303 NE 45th St, www.stgpresents.org, 9 pm, $18 adv/$20 DOS, all ages)

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