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While the author used software to retrieve the sound, I bet it could be done with photochemical methods onto a copper disk, similar to how circuit boards are et

While the author used software to retrieve the sound, I bet it could be done with photochemical methods onto a copper disk, similar to how circuit boards are etched. Or how soundtracks are photographed onto movie film.

ada1981 9y ago
I never thought about this until your comment. Fascinating! https://en.m.wikipedia.org/wiki/Sound-on-film https://en.m.wikipedia.org/wiki/Sound-on-film I'm blown away by the complexity of sound that can be conveyed in what seems a simple manner.
- jacquesm 9y ago
  That's because in essence even the most complex sounds change just one environmental variable: local air pressure.
  - ada1981 9y ago
    I'm falling in love with sound all over again. Yes, that is obvious now that you say it, but I never realized it before. Thanks!