There’s another theremin hero video up http://uk.youtube.com/watch?v=_UVOtMD8InY This time including a..thing that tracks face muscle movement to trigger a sound…I couldn’t quite see why. Enjoy!
Stop…Wiki time 
A brain-computer interface (BCI), sometimes called a direct neural interface or a brain-machine interface, is a direct communication pathway between a brain (or brain cell culture) and an external device. In one-way BCIs, computers either accept commands from the brain or send signals to it (for example, to restore vision) but not both.
Thanks mate, I didn’t want to mention its name in the message in case someone asked me what it was… 