NPR is streaming the new single from The Avett Brothers, “Another Is Waiting.” The song is from the band’s upcoming album Magpie and the Dandelion, due out on Oct. 15. It’s been less than year since they released the Grammy-nominated The Carpenter, but the band said they were so creatively inspired while working with producer Rick Rubin on The Carpenter, that they wrote an entire new album following its release …