Active since 1987, the year he debuted behind Guru as one-half of Gang Starr, DJ Premier is one of the most crucial figures in hip-hop. No more than three producers (Dr. Dre, RZA, and Prince Paul) can test Premier's status as the most important trackmaster of the '90s, and no style is more distinctive. Aggressive and raw, a Premier track is an instantly recognizable soundclash of battling loops and heavy scratching -- all of them perfectly timed -- that evokes the sound of Brooklyn better than anyone else. Besides helming Gang Starr's seven albums, including the remarkable seq...