UMO’s Ruban Nielson Credit: Jana Birchum

When songwriter Ruban Nielson released Multi-Love, third LP and magnum opus of his Unknown Mortal Orchestra project, he’d traded in the lo-fi psych elements of his previous work for mild R&B, producing a bland-out more notable for its ruminations on a failed polyamorous relationship than its music. What a difference a live shot of ACL Fest energy can make.

UMO’s Ruban Nielson Credit: Jana Birchum

Despite a mix so muddy it left stains, the New Zealand-born frontman’s sense of melody and groove rightly asserted itself in the now Oregonian quartet’s festival set. “Like Acid Rain” proved a tentative opener, its attempt to crossbreed Stevie Wonder with bedroom psych a mixed success at best.

An immediate leap into “Necessary Evil,” a peppy, pure pop highlight of Multi-Love, righted the ship immediately, creamy synths (thumbs up to MVP Quincy McCrary on keys), skronk guitar solos, and irresistible rhythm making it a crowd pleaser. After that, the band could do no wrong – at least with its loyal audience.

Winding solos punctuated the askew Beatle-isms of “From the Sun,” raising as many cheers as the Grateful Dead jamming that ended oldie “So Good at Being in Trouble.” The pop hooks of a shuffling “The World is Crowded” and muscular “Ur Life One Night” could catch barracudas. “How Can You Luv Me” inspired spontaneous dancing.

The wildest frugging erupted during the urgent disco-rock of hit “Can’t Keep Checking My Phone,” as perfect a set-closer for which UMO could ever hope.

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Michael Toland started writing about music in 1988 on the Gulf Coast, moved to Austin in early 1991, and has inflicted bylines upon the corporeal and digital pages of Pop Culture Press, The Big Takeover, Blurt, Amplifier, Austin.citysearch, the Austin American Statesman, Goldmine, Sleazegrinder, Rock & Roll Globe, High Bias, FHT Music Notes, and, since 2011, The Austin Chronicle.