Air Liquide is a German techno group consisting of Ingmar Koch and Cem Oral, formed in 1991. The duo met in Frankfurt am Main in 1991 while working in a recording studio. Its first release, the EP Neue Frankfurter Elektronik Schule, was released in 1992 on the Blue label, which the founders co-founded with Jörg Burger. In 1991, they also co-founded the acid techno label Structure with Burger and Wolfgang Voigt. Vocalist Mary Susan Applegate contributed lyrics and vocals to several of its tracks. In 1995, the group released several albums, including Abuse Your Illusions (1995) and Red (1995). The band gained prominence for its live performances throughout the mid-1990s. Other notable releases include the single "Space Brothers" (2001) and the album X (2001). After releasing the studio album Let Your Ears Be the Receiver (2004), the group disbanded in 2005. The duo reunited for live performances in 2012, performing at various festivals.
