 He obtained his first set of turntables at the age of 14 years.In the summer before his freshman year at the University of Maryland, Rosenberg started hosting a late-night underground hip hop show, "From Dusk 'Til Dawn", on campus radio station WMUC-FM.His initial DJ name was "PMD," an acronym for "Peter From Maryland" (a name given to him by Marley Marl while winning a contest on Marl's radio show).