circuit bending
n.— «[Biff Uranus Blumfumgagne has] invented a few instruments, including the Bat-tar (a heavy bat-shaped electric guitar), the Therolin (a five-string electric violin with a theremin hiding inside), and the Mando-synth (an electric 5-string mandolin with a synth pickup and a whammy bar). “I enjoy circuit bending and experimental musical instruments.”» —“Biff In Bloom ; Musician Making A Name For Himself” by Natasha Kassulke Wisconsin State Journal (Madison) Feb. 14, 2002. (source: Double-Tongued Dictionary)