Jose Rivera participates on SoundCloud under the name Proxemia. A graduate student at MIT, he studies “sound art, geonotational mapping, location recording, experimental music,” and posts audio from his various excursions. One recent track of Rivera’s is “interplace,” a highly detailed sequence of largely drone- and rattle-rich “location recordings,” in his terminology. The phrase suggests something distinct from field recordings, perhaps — something with a more precise sense of position and place. A brief liner note explains that it’s a “composition experiment” for what appears to be the Sensory Ethnography Lab at neighboring Harvard. The lab “promotes innovative combinations of aesthetics and ethnography,” and is run by Lucien Castaing-Taylor and Ernst Karel. Past geonotational efforts by Rivera have included audio-visual documentation of natural and industrial spots in Asheville, North Carolina (which surface in a Disquiet Junto project), among other places.