You may have heard Band of Horses' new one, "Knock Knock," on the radio recently. Here's a video to go along with it. It's a refreshing sound from Band of Horses. As always, there's some nice harmonizing, but the lyrics and driving beat are more in line with their more rocking tunes like Compliments, NW Apartment and Great Salt Lake. Loving the nature scenes (wish I knew where that trail was ... Idaho maybe?). Their new album, Mirage Rock, is due out Sept. 18.