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Vinyl records.
I know there’s grooves but how does a needle going over those tiny grooves make such a specific sound, like the vocals, guitars, drums, keyboards, or any other instrument? And how did people invent this so long ago?
I’ve seen closeups of a needle in a groove but it still doesn’t make sense to me how a few ridges can produce these sounds exactly. And how do they even put those specific grooves in there, especially over a century ago.
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