Once a lively presence on radio, jazz now finds itself relegated to satellite broadcasters and low-watt stations at the edge of the dial. Aaron J. Johnson examines jazz radio from the advent of Black radio in 1948 to its near extinction from the commercial dial after 1980. Even in jazz's heyday, programmers and DJs excluded many styles and artists, and Johnson delves into how the politics of decision-making and the political uses of the medium shaped...