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A Working Pallophotophone - 1922 audio recording method
History of the Pallophotophone 1922
Pallophotophone, Sound on Film
Electrical Recording
Classic Optical Sound Recording
1900 Emperor Franz Joseph oldest magnetic recording on Poulsen Telegraphone
edison 1922 recording blank / first test recording
Old Working Wire Recorder
WGY 4/26/30 Pallophotophone Playback
Sound Recording for Motion Pictures (1959)
Classic Optical Sound Recording
Joseph Tykociner: Demonstration of Sound on Film
