> This means that the signal and spectrum are both sampled discretely and not continuous as that would not be possible on a computer. I mean, true in a technic

> This means that the signal and spectrum are both sampled discretely and not continuous as that would not be possible on a computer. I mean, true in a technical sense, but don't all the sample functions here have known analytical Fourier transforms? One of the coolest parts about this (in my eyes) is seeing how a time shift causes a linear phase rotation in the frequency domain. But one has to choose the parameters very carefully to avoid stark aliasing (not in the Nyquist but just the "see individual line segments" sense). I would've at least hoped for a "sample count" or similar slider to control the sampling resolution. It would also be cool to have functions in the shape dropdown that are not symmetrical. For example, I read the side text about "Taking the Fourier Transform twice results in the original signal flipped along the time axis." and wanted to try that - but with symmetrical functions the flipping is not evident. Sure, introducing a time shift did the trick, but it was a tiny disappointment. Btw, contrary to other comments here, I like the cube visualizations and I think it makes some sense. I mean, it doesn't significantly advance my understanding/intuition by leveraging some geometric relation between the cube faces [1], but just having 3D plots of both time and frequency domain is novel to me. [1] Although I will admit that this will help me in picturing the "apply four times to get back the original function" (does this have a name? Double-involution?).