In 1972-73, Barney Childs embarked on an ambitious attempt to survey the landscape of new American concert music. He recorded freewheeling conversations with fellow composers, most of them under forty, all of them important but most not yet famous. Though unable to publish the interviews in his lifetime, Childs had gathered invaluable dialogues with the likes of Robert Ashley, Olly Wilson, Harold Budd, Christian Wolff, and others. Virginia Anderson...