Jeri Ellsworth is a self taught computer chip designer and hardware developer formally employed by Valve, famous for the Half Life games and Steam digital distribution platform. Jeri has historically had an interest in the famous 1980's computer the Commodore 64 with her own development career focusing largely on C64 based platforms.
Although Jeri is not necessarily musical by nature, it is one of her own projects that may be of more interest. In 2012 Jeri revealed what could be considered the holy grail for geeks and musicians from the early era of home computing.
Here is Jeri Ellsworth with her Commodore 64 bass guitar! The guitar is made out of a genuine Commodore 64, utilising the computer's own sound chip which processes signals sent from the strings by piezo pickups and electronics that she designed herself. The keys on the computer are used to alter the sound into different waveforms, each giving its own retro tone via the C64's 6581 SID sound chip.
Check out this great video of Jeri demonstrating the guitar.