TIL that music is a nonlinear effect.

In the physical sense, that means that we cannot use Fourier analysis to calculate the sounds of an instrument without including its surroundings also.

Usually (in most physical systems) such effects are small and can be neglected without affecting the results of various calculations.

But for musical instruments, it turns out that they are critical. This is the source of partial overtones: non-integer harmonics!

https://en.wikipedia.org/wiki/Overtone

Jean-Michel Jarre's Oxygene 4 re-created in 19 kilobytes of Javascript, including a custom softsynth. https://dittytoy.net/ditty/24373308b4

Lol @ "The song that inspired every electronic musician."