As the stylus moves in the grooves of the record it vibrates. As it does this it transfers these movements to two magnets in the cartridge. The movement of the magnets across wires generates an analog electrical signal that is sent to a pre-amplifer, amplifier, and finally a pair of loud speakers that convert that now amplified analog electrical signal into a audio signal.
If you’re wondering how we discovered how to record sound into groove. Technology connection has a [good video on it](https://www.youtube.com/watch?v=0vbyoZDQaIY).
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