This double-LP set contains a recording of a performance by Klaus Schulze at Brussels University on April 16, 1977. The double-LP also includes a track exclusive to the vinyl edition of the release, "Invisible Musik," recorded in Schulze's studio in Hambühren in November 2007 and originally released on the 2008 compilation Muting the Noise 01. In this excerpt from his liner notes, Klaus Dieter Mueller recalls the process of releasing this singular artifact: "During his career Klaus has played 380 concerts, 119 as soloist and the others with guests or in a group such as Psy Free, Ash Ra Tempel, Tangerine Dream, or Stomu Yamashta's Go. Some of these concerts were recorded and some of it was already released. The very first was the double LP album ...Live... in 1980, and KS promised then, as it was printed on the cover: 'This is my first and last live album.' Meanwhile... we have a few more concert recordings of Klaus Schulze released, for posterity... and for enjoyment of the present listeners. These historic concert recordings from the concert tour in 1977 were partly available before on an illegal bootleg. We had the obvious idea to make this album (and maybe others) finally 'official.'"