Auxiliary electrodes


#1

Hi,
I need to add to the standard Muse electrodes a couple of additional electrodes.
I read that it is (was?) possible through the micro-USB connectors.
Questions:
1.Is it still possible?
2.If so, what’s the interface specification (pin numbers, electrical levels, etc)?
3.What are the auxiliary electrodes referenced to?

If there’s no longer support for the extra electrodes, what’d your suggestion be to add same?

Thx,
David