Berliner patents the gramophone

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Emile Berliner is granted a patent for a machine recording and reproducing sound in a lateral groove of even depth, and moves shortly afterwards from cylinder to flat disc. The disc is the commercially decisive step: it can be pressed from a master in quantity at low unit cost, which turns recording from a curiosity into an industry — and therefore turns musical diffusion into something that happens at the speed of freight rather than the speed of travelling musicians.

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