The veteran trio from Minnesota enlisted Wilco’s Jeff Tweedy to produce this new album of understated intensity. Where Low’s favored tempo is languid, a little uptick like “So Blue” maintains the glow over Steve Garrington’s staccato piano. Mimi Sparrow’s singing on “Holy Ghost” holds some enthralling notes, then eases into mimicking the ghost itself. Her harmonies with Alan Sparhawk capture the sorrow and fear that are at least an element in a thinking person’s life. most vividly on “Just Make it Stop.” For an unexpected birthday song, check the closing chorus of “On My Own.” Low’s name is apt, and shorter than Curiously Tranquil Thrill.