Cluster was a German experimental musical group who influenced the development of contemporary popular electronic and ambient music. They have recorded albums in a wide variety of styles ranging from experimental music to progressive rock, all of which had an avant-garde edge. Cluster was active from 1971 until 2010, releasing a total of 15 albums, including two collaborations with Brian Eno. Musician, writer and rock historian Julian Cope places three Cluster albums in his Krautrock Top 50 and...