Ernst Karel works with sound, including electroacoustic music, experimental nonfiction sound works for multichannel installation and performance, and postproduction sound for nonfiction vilm [film/video], with an emphasis on observational cinema. His recent solo projects are edited/composed using unprocessed location recordings; in performance he sometimes combines these with analog electronics to create pieces which move between the abstract and the documentary. Recent sound projections have been presented at Sonic Acts, Amsterdam; Oboro, Montreal; EMPAC, Troy NY; Arsenal, Berlin; and the 2014 Whitney Biennial. Sound installations in collaboration with Helen Mirra have been exhibited at the Gardner Museum, Boston; Culturgest, Lisbon; KW Institute for Contemporary Art, Berlin; Audiorama, Stockholm; MIT List Visual Arts Center, Cambridge; and in the 2012 Sao Paulo Bienal. Audio-video collaborations include Expedition Content (2020, with Veronika Kusumaryati), Ah humanity! (2015, with Lucien Castaing-Taylor and Véréna Paravel) and Single Stream (2014, with Toby Lee and Pawel Wojtasik). CDs of his often collaborative work, including with the electroacoustic duo EKG, have been released on and/OAR, Another Timbre, Cathnor, Gruenrekorder, Locust, Sedimental, and Sshpuma record labels, and a duo with Bhob Rainey is forthcoming on Erstwhile. From 2006 until 2017 he managed the Sensory Ethnography Lab at Harvard University, doing postproduction sound for films including The Iron Ministry, Manakamana, and Leviathan. He developed and has taught a practice-based course in 'sonic/audio ethnography' both at Harvard and through the Center for Experimental Ethnography, University of Pennsylvania.