Gabe Moskoff calls himself “the luckiest person you know.”
Before he became Trackstar the DJ — one of the headlining performers at this weekend’s MATI Festival — he was just a teenage rap fan applying to college. He didn’t intend to come to St. Louis. He wanted to enroll at either Brown or Columbia University, which would place him on the East Coast where his favorite hip-hop artists hailed from.
But fate had other plans for the Madison, Wisconsin, native…