Le Tempestaire is a 1947 French short drama film written and directed by Jean Epstein.
The grandmother tells the woman that in old times, people believed in "storm masters", old men who could control the wind, but that such things are only superstition.
When the man gently blows at the ball, the waves change speed, move in slow motion, and at one point play backwards.
A recurring motif in Jean Epstein's film theory had from the beginning been cinema's capacity to provide perceptions of time alternative to what can be experienced in daily life.
He was influenced by the musique concrète movement, and stressed that music and "the phonograph" were two separate artforms, the latter with the possibility to provide new dimensions to familiar, non-abstract sounds.