Analysis of information sources in references of the Wikipedia article "I Am Sitting in a Room" in English language version.
in the course of 40 minutes and 32 repetitions" ... "This recording was made by Alvin Lucier on October 29th and 31st, 1980, in the living room of his home in Middletown, CT. The material was recorded on a Nagra tape recorder with an Electro-Voice 635 dynamic microphone and played back on one channel of a Revox A77 tape recorder, Dynaco amplifier and a KLH Model Six loudspeaker.
I AM SITTING IN A ROOM: Lovely Music, Ltd. LP/CD 1013, 1981/1990.