Please answer the following question: Information: - Musique concrete (meaning "concrete music") is a form of musique experimentale (experimental music) that exploits acousmatic listening, meaning sound identities can often be intentionally obscured or appear unconnected to their source cause. It can feature sounds derived from recordings of musical instruments, the human voice, and the natural environment as well as those created using synthesizers and computer-based digital signal processing. Compositions in this idiom are not restricted to the normal musical rules of melody, harmony, rhythm, metre, and so on. Originally contrasted with "pure" "elektronische Musik" (based solely on the production and manipulation of electronically produced sounds rather than recorded sounds), the theoretical basis of "musique concrete" as a compositional practice was developed by Pierre Schaeffer, beginning in the early 1940s. From the late 1960s onward, and particularity in France, the term acousmatic music (musique acousmatique) started to used in reference to fixed media compositions that utilized both musique concrete based techniques and live sound spatialisation. - Dwayne Rudolph Goettel (February 1, 1964August 23, 1995) was a member of the industrial band Skinny Puppy. Classically trained, he played keyboards for an early incarnation of the Canadian gothic/synthpop band Psyche, as well as a band called Water, who opened for Skinny Puppy in 1985. He joined Skinny Puppy during the recording of "" (mid-1986) when he was recruited to take Wilhelm Schroeder's place. Goettel would come to be cEvin Key's primary partner in forming Skinny Puppy's music until the album "The Process", as well as in their side projects Doubting Thomas, Cyberaktif, The Tear Garden and Hilt. Despite being best known for playing keyboards and synthesizers with Skinny Puppy, his first instrument was the trumpet, which he played in his high school band, before moving to Edmonton, where he began learning piano and became involved with the local music scene. He was also a competent drummer, guitarist and bassist. - Skinny Puppy is a Canadian industrial music group, formed in Vancouver, British Columbia, in 1982. The group is widely considered to be one of the founders of the electro-industrial genre. Initially envisioned as an experimental side project by cEvin Key (Kevin Crompton) while he was in the new wave band Images in Vogue, Skinny Puppy evolved into a full-time project with the addition of vocalist Nivek Ogre (Kevin Ogilvie). Over the course of a dozen studio albums and many live tours, Key and Ogre have been the only constant members. Other members have included Dwayne Goettel (19861995), Dave "Rave" Ogilvie (long-time associate, producer, and "unofficial" fourth member until 1995), Mark Walk (2003present), and a number of guests, including Bill Leeb (19851986, under the pseudonym Wilhelm Schroeder), Al Jourgensen (1989), and many others. - Throbbing Gristle were an English music and visual arts group formed in 1976 in Kingston upon Hull. The band comprised Genesis P-Orridge (born Neil Megson; bass guitar, violin, vocals, vibraphone), Cosey Fanni Tutti (born Christine Newby; guitars, cornet, vocals), Peter "Sleazy" Christopherson (tapes, found sounds, horns, piano, vibraphone, synthesizer) and Chris Carter (synthesizers, tapes, electronics). - Electronic music is music that employs electronic musical instruments and electronic music technology in its production, an electronic musician being a musician who composes and/or performs such music. In general, a distinction can be made between sound produced using electromechanical means and that produced using electronic technology. Examples of electromechanical sound producing devices include the telharmonium, Hammond organ, and the electric guitar. Purely electronic sound production can be achieved using devices such as the theremin, sound synthesizer, and computer. - cEvin Key ( born Kevin William Crompton , February 13 , 1961 ) is a Canadian musician and founding member of the industrial music band Skinny Puppy . In addition to his work with Skinny Puppy , Key has had several side projects , including Doubting Thomas , Cyberaktif , and Hilt . After Skinny Puppy disbanded in 1995 , Key 's main project was electronic noise group Download , as well as some solo releases . - Industrial music is a genre of experimental/electronic music that draws on transgressive or provocative sounds and themes. The term was coined in the mid-1970s with the founding of Industrial Records by Genesis P-Orridge of Throbbing Gristle and Monte Cazazza; on Throbbing Gristle's debut album "The Second Annual Report", they coined the slogan "industrial music for industrial people". In general, the style is harsh and challenging. AllMusic defines industrial as the "most abrasive and aggressive fusion of rock and electronic music"; "initially a blend of avant-garde electronics experiments (tape music, musique concrete, white noise, synthesizers, sequencers, etc.) and punk provocation". What entity does 'cevin key' has the relation 'instrument' with?
A:
bass guitar