Mad Kap

Josef Leimberg (born November 29, 1972) is a producer, lyricist, and trumpet player from Los Angeles. He contributed to Kendrick Lamar's Grammy Award-winning album, To Pimp a Butterfly and Snoop Dogg's album R&G (Rhythm & Gangsta): The Masterpiece, and is currently signed with World Galaxy, the jazz imprint of Alpha Pup Records.