Though “Sophia,” the first single off Laura Marling’s third LP, A Creature I Don’t Know, premiered last week as a free stream upon its digital release, the tune will also arrive as a limited 7” on September 12, backed by a live version of album track “Rest In the Bed.” At first, I was hoping that Marling and co. had gone with another studio cut for the release, but after revisiting last year’s video from the WNYC set above, I can see exactly why they’ve included this performance: it’s pretty much perfect. Watch footage of this excellent one-take B-side being recorded above or catch the full show here.