Since their 2006 debut, the progression of images across the five Band of Horses studio albums holds up an excellent mirror to their pastoral, melancholy indie-rock: thick woods on Everything All the Time; a moonlit lake on Cease to Begin; star-streaked night sky on Infinite Arms; and a forbidding cliff on Mirage Rock. For Why Are You OK?, released in June, the Charleston-based quintet chose a pair of topless sunbathers on a lonely beach, finally allowing humans into the picture but keeping them at a certain remove. Produced by Jason Lytle of maverick 2000s indie faves Grandaddy, OK? tempers the usual wildness in the Horses’ chiming guitars with subtle layers of synthesizer, appropriate for a group whose leader, Ben Bridwell, wrote the new songs while his young children were asleep or at school. At the same time, frisky songs like “Casual Party” suggest Bridwell is still quite a ways from putting his Horses completely out to pasture.