Colin Marshall talks to John Rabe, longtime public radio personality and host of KPCC’s Off-Ramp, a weekly examination of Southern California and especially Los Angeles. The show’s interviews and field pieces provide, as Rabe puts it, a “pointillist” aural portrait of the city and its surrounding half-state, highlighting some of the most interesting people, places, and things there without attempting the futile task of precisely representing the massive amount and constantly changing composition of Southern California culture.