This application is written in C++. It has no accessibility features because nobody has ever figured how to do that with a virtual modular synthesis environmen

This application is written in C++. It has no accessibility features because nobody has ever figured how to do that with a virtual modular synthesis environment that is absolutely intended to be (a) extremely skeuomorphic (b) extremely visual. The same issue exists in the native world too, and isn't going to be solved by somehow connecting a DOM with the canvas.