Untitled Mastered

"Untitled Unmastered"   is a compilation album by American hip hop recording artist Kendrick Lamar. It was released on March 4, 2016 by Top Dawg Entertainment, Aftermath Entertainment, and Interscope Records. It consists of previously unreleased demos that originated during the recording of Lamar's album To Pimp a Butterfly (2015). It continues that work's exploration of politically-charged and psychological themes, as well as its experimentation with free jazz, soul, avant-garde, and funk styles. The album received acclaim from music critics.