I really don't know if I'm in the right place, but if you guys can't help me, maybe you know someone you do.
I need some piece of hardware that can connect my guitar to my computer, through a regular jack, so that I can interpret the signal from the guitar as digital (like MIDI), and use it whit some kind of programming language, like js or C.
The hardware must be something like an arduino, or a raspberry pi. I don't know if a regular sound hardware will do the trick.
(sorry for any bad grammar)
Not sure why you would need an Arduino in the chain.
You need help from someone versed in musical instruments and PCs or audio equipment.