Ty Segall never stops moving forward; if he ever takes a backward glance, it seems, it’s only to discover inspiration in a record bin. This perpetual motion makes the release of “Live” “At” “The” “BBC” noteworthy: An excavation of a June 2016 set, it represents one of the rare times Segall has looked in the rearview mirror. This isn’t the first official live set from Segall—notably there’s Deformed Lobes, a documentation of a 2018 jaunt with the Freedom Band. Though it’s a slight sprint through its five songs, “Live” “At” “The” “BBC” feels like the purest distillation of Segall’s psychedelic chaos, emphasizing energy over expansive space. Here, Segall abandons all instruments to concentrate on vocals, leaving his session players to gel into a real band.