Our guests are the authors and stars of Salvation, a rock show "advertised and generally thought of," as WFB puts it, "as the successor to Hair." We begin by listening to a few minutes of their work, "at roughly the sound level," according to WFB, "the audience hears it at" in the theater. Mr. Courtney demurs from that description: "The playing of that music at the level at which you hear it in the theater is impossible. Unfortunately, the people at home are sitting there with three-inch speakers on their television sets, due to the desire of the television manufacturers in this country to save as much money as possible to rob you of your needed sound." And so on, through denunciations of hypocrisy regarding sex, the importance of "vibrations" in rock music, and the rest of the kid scene A.D. 1969. Where this show sometimes misses as conversation, it works as illustration.