(Nectar) Blockhead's most significant and celebrated contribution to hiphop is found in the beats he produced for Aesop Rock in the late '90s and the early '00s. One can even argue that he and the founder of Definitive Jux, El-P, laid down the foundation for NYC's dark, post-illbient underground sound—Blockhead with his production work on Aesop Rock's Float (2000) and El-P with his production work on Cannibal Ox's The Cold Vein (2001). In 2004, Blockhead, who is often too musical to be of any use to a rapper, joined the triphop institution Ninja Tune, and he has been with the label ever since. My favorite Blockhead moment? The opening of "Commencement at the Obedience Academy"—Blade Runner and underground hiphop are a match made in heaven.