[5][7] Common features include the use of chordophones such as electric and acoustic guitar, violin and piano, as well as electronic instruments such as synthesizer, sampler and drum machine.Attrition,[38] Die Form (France), Pink Industry (UK), Psyche (Canada), Kirlian Camera (Italy) and Clan of Xymox (Netherlands)[39] performed this music in the 1980s.Invasion,[8] Unlimited Systems, Moloko †, Maerchenbraut,[43][8] Cyan Revue,[18] Leningrad Sandwich,[18] Stimmen der Stille, Belfegore,[44] and Pink Turns Blue.[47][43] Ataraxia and the Frozen Autumn from Italy, and the French Corpus Delicti also evolved from this movement and became the leading artists of the west Romanesque dark wave scene.[64] Joshua Gunn, a professor of communication studies at Louisiana University, described the U.S. type of dark wave music as: ...an expansion of the rather limited gothic repertoire into electronica and, in a way, the US answer to the "ethereal" subgenre that developed in Europe (e.g. Dead Can Dance).[66][31] In the second half of the 1980s, former post-punk bands such as Dead Can Dance (Within the Realm of a Dying Sun, 1987[68]) and In the Nursery (Stormhorse, 1987[67]) released influential albums which essentially laid the foundations of the genre.[66][56] Other artists include Arcana,[31] Ataraxia,[66] Autumn Tears,[69] Camerata Mediolanense,[70] Dargaard,[71] Dark Sanctuary[31] Impressions of Winter,[72] Ophelia's Dream,[73] Les Secrets de Morphée,[56] Love Is Colder Than Death,[74] Stoa,[67] and WeltenBrand.