More in-depth article at <a href="http://www.chicagoreader.com/chicago/katinka-kleijn-daniel-dehaan-ryan-ingebritsen-cello-brain-wave-eeg/Content?oid=8417453" rel="nofollow">http://www.chicagoreader.com/chicago/katinka-kleijn-daniel-d...</a><p>The unit they're using is the EPOC Neuroheadset.