Sound??

In this 1966 experimental film, composer John Cage and multi-reed jazzman Rahsaan Roland Kirk explore the nature and meaning of sound. Kirk, filmed at at Ronny Scott's in London, is on fire, playing his trademark quiver of tenor and soprano sax, flute, manzello, stritch and nose flute with great brio. The years haven't been as kind to Cage, whose stilted readings make the film seem like, well, an experimental film from 1966.

From Martin Williams of Jazz Times:

Although Rahsaan Roland Kirk and John Cage never actually meet in this film (Cage's enigmatic questions about sound are intercut with some of Kirk's more ambitious experiments with it) these two very different musical iconoclasts share a similar vision of the boundless possibilities of music. Kirk plays three saxes at once, switches to flute, incorporates tapes of birds played backwards, and finally hands out whistles to his audience and encourages them to accompany him, "in the key of W, if you please." Cage, on the other hand, is preparing a work for musical bicycle with David Tudor and Merce Cunningham at the Seville Theatre in London. Cage meets Rahsaan's music in an echo chamber, and he ends his search for the sound of silence in his favorite spot -- the anechoic chamber -- where it turns out to be the uproar of "your nervous system in operation."