Florence + the Machine

9:30 p.m. Altar Stage

From South London, British chanteuse Florence Welch is the striking frontwoman in Florence + the Machine. The dramatic Friday night Voodoo Experience headliner’s music reaches from the ethereal to the bombastic. Welch released her belated third album, “How Big, How Blue, How Beautiful,” in June.

Modest Mouse

7:45 p.m. Altar Stage

The dark, off-kilter pop-rock of Isaac Brock’s Modest Mouse became a surprise mainstream success in 2004 via a hit single, “Float On,” and the album “Good News For People Who Love Bad News.” This year’s Modest Mouse album, “Strangers to Ourselves,” the band’s first in eight years, marks a return to classic, and unpredictable, Modest Mouse form.

Jason Isbell

8:30 p.m. Flambeau Stage

Singer-songwriter Jason Isbell launched a solo career following his 2007 departure from loud Southern-rock band Drive-By Truckers. Isbell’s redemption-themed 2013 album, “Southeastern,” elevated him to major artist status. With his 2015 album, “Something More Than Free,” he takes an eclectic turn with folk, folk-rock, country and a smattering of Southern rock.