I posted this as a submission a while ago but you might find it helpful. While learning about signal processing my self I built a collection of educational tool

I posted this as a submission a while ago but you might find it helpful. While learning about signal processing my self I built a collection of educational tools for visualizing some concepts. [1] Especially the fourier cube [2], the complex exponential [3], the digital filter designer [4] and the signal generator [5] might be helpful. Additionally the matrix multiplier [6] has an option for complex numbers that highlights the perspective that complex numbers can be seen as just a subset of 2x2 matrices. [1]: https://tools.laszlokorte.de/ https://tools.laszlokorte.de/ [2]: https://static.laszlokorte.de/fourier/ https://static.laszlokorte.de/fourier/ [3]: https://static.laszlokorte.de/complex-exponential/ https://static.laszlokorte.de/complex-exponential/ [4]: https://static.laszlokorte.de/signal-transform/ https://static.laszlokorte.de/signal-transform/ [5]: https://static.laszlokorte.de/signal-generator/ https://static.laszlokorte.de/signal-generator/ [6]: https://static.laszlokorte.de/matrix-multiplication/ https://static.laszlokorte.de/matrix-multiplication/