“I love this song so much,” says Kristian Matsson, introducing this acoustic take on “Lost My Shape” for KEXP last week. “I can’t really play it or do it justice, but I’m gonna try… I’m gonna try. Sorry, David.” The result of all that unsettled reluctance, it turns out, is a completely reverent, moving performance — an apt complement (and compliment) to David Bazan’s forlorn gem. Watch the Tallest Man on Earth find his way through the Curse Your Branches cut above. His full 20-minute set is here.