Nobody knows the prolific and mercurial Atlanta rapper Young Thug quite like audio engineer Alex Tumay, who worked on the artist's *Slime Season* trilogy of mixtapes, *I’m Up* and *JEFFERY*. An unheralded yet essential presence on a number of pivotal Atlanta hip-hop albums, Tumay has also worked with Travis Scott on *Rodeo* and lent his ear to “Highlights” from Kanye West’s *The Life of Pablo*. His behind-the-scenes work has been especially crucial in shaping Young Thug’s recorded output, and he’s helping round out the hard sound of Atlanta’s top beatmakers.