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Feeling that groove
(mander.xyz)
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this post was submitted on 22 Nov 2025
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It's not that hard to grasp I don't think. If you understand graphs of soundwaves, it's literally just the wave scratched into the plastic. The movement of the needle dictates the movement of the speaker membrane which results in the same movement in your eardrum. Which is what you percieve as sound.
What I don't get, personally, is how this one scratched-in groove wave can contain a bassline, a melody and a singing voice and they all can be differentiated coming out of the speaker.
How speakers work in general is just black magic to me, actually.
That's because it doesn't, your brain does
Speakers do the simplest thing possible and literally just vibrate. A recording being played literally just recreates a recorded vibration. It's a tiny choreography that your ears are incredibly sensitive for.
All the fancy stuff happens in our brains, after our ears has split up the sound around us into different ranges of frequencies (you can think of the hairs in the inner ears as tuning forks). We learn to recognize which frequencies goes together, and then we learn how the frequencies from multiple sources can overlap, and we learn what it all means
The real crazy part is how something as simple as sound can carry so much information and how reliably our brains can tell it all apart and make sense of it
This.