Uploaded February 2016 | Updated September 2026, 3 weeks ago
Around 1950, Oscar-winning audio engineer Loren Ryder of Ryder Sound in Hollywood asked his friend Stefan Kudelski, an audio engineer from Poland, to help him solve a problem. The issue was that Hollywood was using an Ampex 200 tape recorder to record dialog for movies. It sounded great, but it was so large in it took two or more grips to carry it around on the movie set. Ryder asked Kudelski if he could build something a lot smaller.
Kudelski’s company made robotics, and he had developed a small tape recorder to send data to the robots. So, he set about to modify his tape machine to be used for movies.
His first tape recorder for film, the Nagra I, was introduced in 1951. It was light, rugged, and compact. When the Nagra III was introduced in 1957, it could also record Neo-Pilot tone, which made it possible to stay in sync with the camera. In the following years stereo and timecode models were introduced.
These machines were the audio workhorses on all movies until the early 1990s when DAT and other digital recorders became available.
By the way, Kudeski called his tape recorder Nagra, because Nagra in Polish means “to record”.
Around 1950, Oscar-winning audio engineer Loren Ryder of Ryder Sound in Hollywood asked his friend Stefan Kudelski, an audio engineer from Poland, to help him solve a problem. The issue was that Hollywood was using an Ampex 200 tape recorder to record dialog for movies. It sounded great, but it was so large in it took two or more grips to carry it around on the movie set. Ryder asked Kudelski if he could build something a lot smaller.
Kudelski’s company made robotics, and he had developed a small tape recorder to send data to the robots. So, he set about to modify his tape machine to be used for movies.
His first tape recorder for film, the Nagra I, was introduced in 1951. It was light, rugged, and compact. When the Nagra III was introduced in 1957, it could also record Neo-Pilot tone, which made it possible to stay in sync with the camera. In the following years stereo and timecode models were introduced.
These machines were the audio workhorses on all movies until the early 1990s when DAT and other digital recorders became available.
By the way, Kudeski called his tape recorder Nagra, because Nagra in Polish means “to record”.
