Beck co-headlined the first day of this festival in Atlanta.
Setlist mostly from setlist.fm, but it also had some odd and unlikely tracks listed which I'd want better confirmation before adding (ie., it says Beck played "Scarecrow" and "Strange Apparition"). So consider this one incomplete and maybe out-of-order.
[people and bands
Bass: Dwayne Moore
Drums: Joey Waronker
Guitar (Acoustic): Beck Hansen, Jason Falkner
Guitar (Electric): Beck Hansen, Jason Falkner
Headliner: Deadmau5, The Killers, Twenty One Pilots
keyboards: Roger Joseph Manning Jr.
Opening Act: Band Of Horses, Chvrches, City and Colour
Synthesizer: Roger Joseph Manning Jr.
Vocals: Beck Hansen
Vocals (Background): Jason Falkner, Roger Joseph Manning Jr.