Phonovision, an experimental process for recording a television signal on phonograph records, was developed in the late 1920s in London by Scottish television pioneer John Logie Baird. The objective wasn't simply to record video, but to record it synchronously, as Baird intended playback from an inexpensive playback device, which he called a 'Phonovisor'. The process involved mechanically linking the television scanning mechanism, a Nipkow disk, and the record-mastering turntable. The video sign… (More on Phonovision)