“Imagine a folk album influenced by the ambient textures of Sunn O))) and Swans, plus the sonic intensity of Xylouris White and My Bloody Valentine. Ever since their first recordings as four-piece Lynched, in 2014, Lankum have been subjecting their songs to increasingly extreme treatments in dynamics, arrangements and length. (Warning: The Livelong Day clocks in at 57 minutes, despite having only e”