via link where you'll find more info.
"It had special digital filters for each string signal, infra-red pickups, and a lot of code to handle things like fret buzzes, harmonics, etc. Kevin Kent and I started company called K-Muse to manufacture it. Later we decided to license it to Gibson. Gibson manufactured it under the name 'Phi-Tech'."
Also see Keyboard Museum and chuckwhite.com
