From his start as a true unknown — early tracks posted to music blogs in 2010 spurred a flurry of "Who Is Unknown Mortal Orchestra?" meta-queries — New Zealand maestro Ruban Nielson has cultivated an air of distant mystery that only bolstered his time-warped productions, the sort of warming funk discovery that keeps record stores' doors open and crate-diggers on an eternal Easter egg hunt. All at once, his third album, last year's Multi-Love (Jagjaguwar), lifts the lo-fi veil and pulls listeners into a probing self-examination of polyamory — and proves that getting to know Unknown Mortal Orchestra does nothing but deepen the allure. "Isolation can put a gun in your hand," Nielson warned on "From the Sun," from 2013's II; on Multi-Love's opening baroque-down title track and loping disco single "Can't Keep Checking My Phone," he has the opposite problem: One may be the loneliest number, but three can be a tragic one. Lower Dens — the vehicle that carried Jana Hunter from folk spook to New Wave supreme being — opens. Tickets $15 in advance, $18 day of show.