I have seen this movie in Paris (1974) two times in one week. One of the best music films i have seen. It is a mix of Free Jazz en Rock musicians on stage. Great performance of Pink Floyd (the best i have seen from them on movie). Free Jazz musicians everywhere, the movie opens with Steve Lacy. But the best performance is from the great Captain Beefheart and the Magic Band, they playing the Music from the 2 record Trout Mask Replica, they all are in uniform ;) , like as on the 2 record. But this movie is not to get :( Nobody known where he is.