Crystal Voyager

Crystal Voyager is a 1973 Australian surf film directed by David Elfick. It was filmed by Albert Falzon, written and narrated by surfer, photographer and filmmaker George Greenough who had previously made the 1970 surfing film The Innermost Limits of Pure Fun.The soundtrack was written and produced and performed by G.Wayne Thomas and the Crystal Voyager Band.

In the year it was released the soundtrack won an Aria Award for Best Australian Movie Soundtrack. The closing sequence, Greenoughs short film Echoes, is generally considered to be the highlight of the film. Filmed with a camera in a waterproof housing strapped to Greenoughs back, the sequence is composed entirely of slowmotion footage shot inside the curl of waves, edited to the 23minute song Echoes by Pink Floyd. The group reportedly allowed Elfick and Greenough to use the music in their film in exchange for the use of Greenoughs footage as a visual background when they performed Echoes in concert.

Source: Wikipedia