Vanilla is a product of Lussumo:Documentation and Support.
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Three men use some modern-day inspiration to retrieve 80-year-old Edison radio broadcasts from old technology.
The unlikely resurrection story began when archivist Chris Hunter grew curious about 13 undocumented film canisters tucked away on a bottom shelf among 5 million items in the basement archives of the Schenectady Museum & Suits-Bueche Planetarium....The pallophotophone was a technology developed by GE engineer Charles Hoxie in the early 1920s and it bridged the gap between cinema's silent era and "talkies." The big, boxy recorder used 35 mm sprocketless film, with each strip containing a series of eight to10 parallel soundtracks etched on acetate and nitrate film. It used light bouncing off a tiny mirror to expose each strip of film and to capture the sound.DeMuth had very little to work with, aside from a few archival photographs of the original machine. He had to scour eBay for old film reels and other long-out-of-production parts to build his device. He was not at all confident of its functionality.
To forestall compatibility problems after a decade of theatres racing to install sound equipment and filmmakers rushing "talkies" into production, in the late 1930s the film industry adopted a standardized theatre playback response that today is called the "Academy" characteristic. While this resulted in a system of recording and playback that made it possible for just about any film to sound acceptable in any theatre in the world, it lacked the flexibility to incorporate improvements beyond the limitations of the 1930s. Indeed, well into the 1970s conventional optical sound reproduction in the theatre had a frequency response little wider than a telephone's.Upon investigation, Dolby found that many of the limitations in optical sound stemmed directly from its significantly high background noise. To filter this noise, the high-frequency response of theatre playback systems was deliberately curtailed (the "Academy" characteristic). To make matters worse, to increase dialogue intelligibility over such systems, sound mixers were recording soundtracks with so much high-frequency pre-emphasis that high distortion resulted. (http://www.dolby.com/about/who-we-are/our-history/history-3.html)