I saw this old Gvox Guitar Pickup at a thrift store for $3USD and I had to pick it up. This thing seems to remind me of the newer Roland GK-2 pickups that are sometimes found on a Fender Strat. I was wondering if someone knew more about this unit? Is it an older form of a MIDI pickup? Or is it something else? Also, is it possible to use this on a modern computer by using a Serial Connector to USB? Or do I need to pull out my 20 year old laptop to run this? Thanks! Any help on this weird piece of tech would be appreciated!