Originally, Gregorian was conceived as a more pop-oriented group in the vein of Enigma. Under this concept, Peterson together with Matthias Meissner and Thomas Schwarz, recorded the 1991 album Sadisfaction, with lead vocals provided by The Sisters of Oz: Susana Espelleta (Peterson’s wife at the time) and Birgit Freud. However, this was the only album by the trio in that style.
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