My EEG system records the electrode voltages relative to each other. (like F3-C3, C3-P3 etc). how can i get the voltages with respect to a common reference point -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20061209/aa6aab65/attachment.html>