> If I am not mistaken, I think there are MIDI guitars that do this > optically, as well as guitars that are built with Roland pickups > pre-installed. I'm not sure I would want to play an instrument that has > electric current running through the strings! And impoperly wired > normal electric guitar can be a shock hazard as it is! Bah. Touch a battery. Feel anything? This could be much less current than that. Yes, you can certainly get shocked by a poorly grounded sound system, because the strings are connected to the guitar's "ground". But this wouldn't be any worse for risk.
