Harmonia was a 1970s Krautrock supergroup from Germany. They formed as a collaboration between Michael Rother of Neu! and Hans-Joachim Roedelius and Dieter Moebius of Cluster. The collaboration only lasted for two complete albums, 1974's Musik von Harmonia and 1975's Deluxe . As two-thirds of the group were the entirety of Cluster, the albums leaned more towards that band's ambient-tinged rock than Neu's motorik rock. Brian Eno, who once called them "the world's most important rock group", recorded an album with Harmonia in 1976 titled Tracks and Traces , which was not released until 1997.