This CD is the first-ever release of an extraordinary 1987 New York City performance. Recorded at the Great Hall of the New York Hall of Science, this majestic recording captures the 60-minute opening performance of Yoshi Wada's interactive sound installation "The Appointed Cloud", which consisted of a self-made 80-pipe organ, a pipe gong, sirens and a massive suspended metal sheet, all triggered by a computer program designed by David Rayna, who assisted La Monte Young in his electronic work and performances in 1980s. The CD also features Wada, Bob Drombowski and Wayne Hankin on bagpipes, plus Michael Pugliese, who ever worked with David Tudor for Merce Cunningham's dance company, on percussion.