I can sort of understand records mimicing the sound of instruments, but voices are so unique, how did we ever figure out the exact carving of a piece of vinyl that when you drag a needle across it, you’ll get the same sound as x or y person’s voice exactly?
In: Other
The grooves aren’t carved by hand to produce that sound. They are directly carved *by* the sound they will eventually reproduce.
If you sing into a piece of paper you’ll notice it starts vibrating. Attach a needle to the piece of paper, place the needle onto a easy to scratch material and you have a way of recording your voice.
Obviously you’re gonna need something more sensitive to get anything near high quality audio, but that’s the principle behind it.
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