Legendary hardware hacker Jeri Ellsworth (world's most awesome C64 hacker and all round happy mutant), entertained attendees at the Maker Faire with her brilliant Commodore 64 bass keytar, which she played while wearing rollerskates.
Ellsworth noted via Twitter that it uses the SID chip and is based on an FPGA - a re-implementation of the Commodore-64 computer using reconfigurable logic chips. See the video below for an overview of the instrument from Ellsworth.
What’s not obvious from the photo above is that Ellsworth wears a portable amp and rocks the C64 Bass Guitar on roller skates. <3