Do you mean building something like this software demo, or turning it into a real instrument? In software, honestly the MDN docs for the web audio API is a pre

Do you mean building something like this software demo, or turning it into a real instrument? In software, honestly the MDN docs for the web audio API is a pretty great starting point. Assumes very little prior knowledge, and goes into a lot of detail about how to do things. https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API/Basic_concepts_behind_Web_Audio_API https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_A... I've used a software synthesizer called SuperCollider through a wrapper API called Overtone. https://supercollider.github.io/ https://supercollider.github.io/ https://overtone.github.io/docs.html https://overtone.github.io/docs.html Lots of resources on those as well, if you're interested to learn. In hardware, if you want to do the actual wave synthesizing... you've got analog and digital options. Pretty big DIY community around both, depending on your leanings. I find adding "arduino" to search terms gives lots of examples and tutorials of building instruments that you could adapt to non-arduino contexts.