What did inventors like Edison and de Forest primarily accomplish in the first stage of sound evolution?
Answer
Synchronizing sound to image using experimental methods
The first stage of the sound revolution centered around the fundamental 'Invention' of linking recorded audio with moving pictures. Key figures like Thomas Edison experimented early on using devices like the Kinetophone, pairing phonograph cylinders with projection. Lee de Forest was also instrumental in developing sound-on-film techniques like Phonofilm. These efforts succeeded in establishing that sound *could* be paired with image motion, even if imperfectly or requiring manual intervention, thus paving the way for the subsequent, more challenging phase of commercial adoption and eventual standardization.
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