Documentary
Patent Nr. 314805
📅 Sunday, 17 May 2020⏱️ 2m
🎬 Directed by Mika Taanila🏢 Elokuvayhtiö Testifilmi
★ 0.0
★★★★★
TMDB Rating
Finnish engineer Eric Tigerstedt solved the dilemma of sound-on-film already before the First World War. All images and sounds in this short film are produced from the surviving test materials originally created in 1914.
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