Optical sound
![[History Of] Motion Picture Sound Recording](http://data.docslib.org/img/264x/50cee071f9f9f1a2f7ecddbfd860c17e.webp)
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- History of Sound Motion Pictures by Edward W Kellogg Third Installment
- Animated Music” in the Early Twentieth Century
- November 4 8
- US Patent 7911580
- Variable Density Sound-On-Film
- The Advent of Sound in Motion Pictures Michael P
- Ilario Meandri a History of Technique in Film Music and Film Sound Post
- The Challenge of Sound Restoration from 1927 to Digital Author(S): Jean-Pierre Verscheure, Philip Carli, Alice Carli Source: Film History, Vol
- MODERN RECORDING .. Asummaryojmethods