This week's episode of All Songs Considered is a journey of sound. Bob has a new favorite noise app, so he and Robin Hilton go on a sonic expedition that includes a spring walk, a gaggle of purring kittens, and a rolling rain storm (thunder optional). As if kittens weren't enough, Bob and Robin also have six new songs to share, including a British band, a Scandinavian band that sounds British, and an American band that sounds Scandinavian. All that, plus some dramatic baroque pop and the imagined soundtrack to a drug lord's childhood.