Talk about old school, here's a captivating
PBS Newshour segment about the restoration by the
Lawrence Berkeley National Laboratory of one of the oldest recordings ever made. The recording was originally done on a thin piece of tin foil that was so fragile that it couldn't be played, so they had to scan it with a super hi-res 3D camera in order to digitize the modulation for playback. The foil was folded 7 times and stored in an envelop for 140 or so years before it was found, so the fact that they were able to extract any sound at all is amazing. Simply fascinating!
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