An hour-long lecture in two parts from field recordist Chris Watson. Part One defines a personal ontology for recordings, dividing sounds into (sometimes metaphorical) ‘atmospheres,’ ‘habitats,’ and ‘featured species,’ and describes several favorite techniques Chris has used to make those different kinds of recordings. Part Two features an in-depth account of recent work with four-channel surround sound hydrophone recording, both in the open water and buried in shallow sand or mud. Both sections are richly illustrated with favorite old and new and unreleased recordings, in both stereo and four-channel surround. (The presentation was recorded in Stereo, via a single point stereo mic in the room.