When I was mentioning electrodes, I made the assumption signal quality was the prime target, but you're right, I didn't address that directly. Of course there a

When I was mentioning electrodes, I made the assumption signal quality was the prime target, but you're right, I didn't address that directly. Of course there are other considerations as well, but signal quality is the main one. I'm not sure where you are getting your "few bits/second" number. EEG chips can sample thousands of times per second, and it would also depend on how many channels you are running, and what you're looking for. So the example OpenBCI board I linked to is an 8 channel device with 8,000 samples per second and 24 bits per sample - so 15m bits/second. Or perhaps I'm misunderstanding the question.