Where did Ratatat go? And What are they doing? No one has heard anything from the electronic duo Ratatat since their release of LP4 in June 2010. While we’re all holding our breathe waiting for any news of LP5,  we get some consolation with a solo release from Evan Mast, one half of Ratatat, under his solo project E.VAX. His first track since “$100 Bill”, a track Mast produced for Jay Z featured on The Great Gatsby soundtrack.