Description: A system that allows a guitarist to play sound from a synthesizer. May consist of a guitar with modified pickups, a standalone unit or a number of combinations.
Wikipedia: https://en.wikipedia.org/wiki/Guitar_synthesizer
Instrument family: guitars/electronic instruments
Appears on:

1. Ace Frehley (played by Ace Frehley on track 4 "Ozone", credited as synthesizer)
2. U.K. Breakfast (played by Toshihiko Takamizawa, currently uncredited)
3. DNA Communication (played by Toshihiko Takamizawa, currently uncredited)
4. The Cauldron Journey for Healing (played by Jerry Garcia, credited as additional synthesizer)