Watch Craters (2021) : Full Movie Online Free A audiovisual attempt at something like Roland Kayn's notion of "cybernetic music," in which the dynamics of the piece are generated on their own by the intermingling of feedback loops and the whole thing largely plays itself. The audio is a handful of sine waves being frequency modulated by other sine waves, the frequencies of which are being controlled by the values of various parameters in the feedback path, which change at random.