In May 1978 Kraftwerk released "The Man-Machine" (German: "Die Mensch-Maschine"), recorded at the Kling Klang Studio. Due to the complexity of the recording, the album was mixed at Studio Rudas in Düsseldorf. The band hired sound engineer Leanard Jackson from Detroit to work with Joschko Rudas on the final mix. "The Man-Machine" was the first Kraftwerk album where Karl Bartos was cocredited as a songwriter. The cover, produced in black, white and red, was inspired by Russian artist El Lissitzky and the Suprematism movement. Gunther Frohling photographed the group for the cover, a now-iconic image which featured the quartet dressed in red shirts and black ties. After it was released Kraftwerk did not release another album for three years.