Grandmixer D.ST., born Derek Showard in the Bronx, New York, is a pioneering DJ and influential figure in the development of turntablism and hip-hop music. His musical style, characterized by innovative scratching and mixing techniques, helped define the sound of early hip-hop and breakbeat DJing. He gained significant recognition for his work on Herbie Hancock's Grammy-winning track "Rockit," where his turntable skills were used as a form of percussion. D.ST.'s influence extends beyond music, contributing to the cultural recognition of turntablism as an art form.