>>106894560
So mean. But good eye. It's SDL2. It's pretty lame, but I needed something quick. I only cared about it for sanity checks.
Here's the latest synth. That's me playing with the two oscillators, the phase modulation, wave folding, phase modulation and LPF. I change the controls with a midi thingie because it has midi input, of course. Really simple to decode.
This one has braille term output (in addition to SDL and, eventually, ported to esp32). Video output is real time, but my ffmpeg cannot record it for some reason. You'd have to trust me, but i know you won't. It only uses standard C libs (when compiled without SDL and using braille instead).
Here's with audio if you like listening to terrible, awful sounds. I have no music in me, but I like the funny sounds.
>https://litter.catbox.moe/enx96f1yhrisjlso.mp4
I don't limit the amplitude from the two main oscillators so samples are free to wrap around. That's what causes the crackling. I like it. The HPF is definitely broken. I'll fix it soon.

>>106894717
I made the graphics thing like 7 years ago. Got tired of the software the cutter came with. Tried with inkscape but it's too damn slow for... everything. Tried OpenSCAD and, in addition to being slow, it doesn't allow open shapes. That was a must for me.