The Gospel of Matthew: Matthew Shipp discusses the mystery at the heart of the artistic process “Underdocumented” is not an adjective that applies to pianist Matthew Shipp, who turned 60 last December. As an example, The Unidentifiable,… This content is available to subscribers only. To continue reading, please login or start a FREE 14-Day Digital Subscription. Bundle your subscription with our award-winning print magazine here. Join Our Email Newsletter Join thousands of other jazz enthusiasts and get new music, artists, albums, events and more delivered to your inbox. Sign Up Now!