Definitions for "Pilottone"
60hz (50hz in Europe) reference signal, used in sync sounding, which is recorded onto the audio portion of the tape.
Pilottone and the related neo-pilottone are special synchronization signals recorded by analog audio recorders designed for use in motion picture production. Before the adoption of timecode by the motion picture industry in the late 1980s, pilottone-sync was the basis of all motion picture sound recording systems.