Amy Oelsner's homemade pop songs sparkle with these eternal truths: that story-telling is part of being alive, and excavating the past is part of growth. Oelsner, who records as Amy O, is a lifer of the indie-pop underground for whom songwriting is a way of processing the passing of time. Her latest, Shell, brims with poetic granular details of everyday life; it's her third studio album, and tenth including her many years of home recordings.