KCRW’s Private Playlist is a weekly listening session with Southern California’s most notable musical figures in their private creative environments. A prolific writer, producer, and performer, M. Ward is one of those characters for whom it’s hard to choose a career highlight. For some, he’s best known as one-half of She & Him with Zooey Deschanel. For others, it’s his participation in the Monsters of Folk supergroup with Conor Oberst, Jim James, and Mike Mogis. Those who don’t know him by name may have heard him on the road or in the studio with Mavis Staples, Jenny Lewis, Norah Jones, Cat Power, Neko Case, Lucinda Williams, Peter Buck, and countless others. And all the while, there’s his extensive solo discography, the most recent of which is this year’s “Migration Stories” album.