From the 1960s to the 1980s, the rock radio DJ played an unprecedented creative role in the rock music world. I Am What I Play profiles four disc jockeys in major markets during this period: their programming, their politics and their deep connections with musicians and fans in the heyday of rock radio. Where are they now - and how did they reinvent themselves as the medium changed? Featuring the music of The Ramones, Joni Mitchell, Rush, David Bowie, The Cars, The Sonics and more.