The SDDS development took just 11 months from concept to working sound camera. Wearing a heart monitor and sound camera, Buffy goes out alone. In 1965, Concord offered the Concord F-20 "Sound Camera" tape recorder. It produced the one and only Super 8 sound camera and projector in the USSR. SSB-CT (1942), a wartime 200' capacity single or double-system optical sound camera. The prototype sound camera imprinted the Digital audio and Analog audio 'at speed'.