By using the same controller to control two machines, they were synchronised. Townsend thereby effectively used pilottone, a technique that was common in 16mm news gathering whereby a 50/60 Hz tone was sent from the movie camera to a tape recorder during filming in order to achieve lip-synch sound recording.
By utilizing the same controller to operate two machines, they were synchronized. Townsend thus effectively employed pilottone, a technique commonly used in 16mm news gathering where a 50/60 Hz tone was transmitted from the movie camera to a tape recorder during filming to achieve lip-synch sound recording.