Electrical input from the body is extremely noisy. I wouldn't be surprised if they were using machine learning to train their algorithm to recognize which electrical patterns correspond to which muscles being activated.
The math behind this is actually rather complex. Heavy duty machine learning and statistical analysis.
Well of course. But that's DSP for parsing the muscle contractions, right?
I would imagine you guys didn't do any application-specific math like guidance of the choppers..? Just curious!