I don’t really know how to play or make music, but I’ve messed around with a few tools: there’s rackarrack which is a virtual fx rack for guitar, there’s DAW Ardour, if you are interested in synths and similar there are things like VCV rack and Cardinal, which are modular synth racks, there’s trackers like OpenMPT and Impulse Tracker and Hydrogen, which is a drum machine/sequencer.

If you are on Linux there’s jackd which is an audio system that allows you to route sound through applications with a virtual patchbay.

Excel does it for its formulas. It ends up being just a pain in the ass when you are looking online for info (which means it ends up increasing the barrier of entry, as most stuff online is in English).

Looks like an interesting project, but I can’t understand what’s the advantage of using weird symbols.