http://artinvestment.ru/news/exhibit...16_warhol.html
"In 1964-1966 by Warhol experimented with the screen tests, which resulted in a set series of" Audition "from five hundred black and white silent movies.
Initially, these films were recorded with a frequency of the sound film - 24 frames per second. Subsequently, Warhol wished that the screen tests were shown at 16 frames per second - as it was at an early stage of filmmaking. The result - an unusually smooth pace, gentle rhythm in contrast to the sharp lighting. "