> It doesn't matter if its electricity, a spring/mass system, a bridge, sine-waves, music theory, Fourier Series or anything else, its all going to be represent

> It doesn't matter if its electricity, a spring/mass system, a bridge, sine-waves, music theory, Fourier Series or anything else, its all going to be represented by complex-math extremely elegantly. This is an appeal to "elegance", which I mentioned in my last sentence. I don't disagree; but it's not quite the same as proving "existence".