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.
Basically any wave can be created by adding together individual frequencies, and with some fancy math it’s possible to go the other way with a Fourier transform and get how loud every frequency is (like is displayed in a spectrogram).
I think the real black magic is in how our ears and brains can decode the mess of information coming in and identify meaningful patterns.
A nice related bookmark I have saved. There’s also interactive pert with a slider where you can draw a wave and then add more and more sinusoids to get closer and closer. And of course the square wave, with infinite sinusoids (theoretically). https://www.jezzamon.com/fourier/
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.
So there’s this thing called a Fourier series…
Basically any wave can be created by adding together individual frequencies, and with some fancy math it’s possible to go the other way with a Fourier transform and get how loud every frequency is (like is displayed in a spectrogram).
I think the real black magic is in how our ears and brains can decode the mess of information coming in and identify meaningful patterns.
A nice related bookmark I have saved. There’s also interactive pert with a slider where you can draw a wave and then add more and more sinusoids to get closer and closer. And of course the square wave, with infinite sinusoids (theoretically).
https://www.jezzamon.com/fourier/