Enigma is a musical project started by Michael Cretu and his wife Sandra Cretu (known simply as Sandra), in 1990. Michael is both the composer and the producer Sandra often provides vocals on Enigma tracks.

With their 1991 hit Sadeness, Enigma brought the new age fascination with Gregorian chants and old-world culture to the clubs the resulting single was both unique and irresistible. The rest of the album followed that pattern successfully, although without quite matching the stunning success of the hit single. On their second album, 1994s Cross of Changes, some of the old-world elements remained, but the new age angle came to the forefront in a set of slick, radio-friendly dance-pop. Enigma 3: Le Roi Est Mort, Vive le Roi followed in 1996. A side project, Trance Atlantic Airwaves, issued The Energy of Sound in 1998. The fourth Enigma record, The Screen Behind the Mirror, followed in early 2000, and in 2003 Voyageur came out. Three years later, A Posteriori was released. The Enigma project has slowly taken a turn into a more sleek, electronic/trance sound.