David "Rat" Levine is the founder of Rat Sound and Sound Tools, a sound system designer, sound consultant and live sound engineer for many well-known artists such as Black Flag, the Red Hot Chili Peppers, Pearl Jam, Rage Against the Machine and Blink-182. Rat ran sound for the first Warped Tour in 1995, and has served annually as sound system provider at Coachella since its founding in 1999.