This is one of the earliest unofficial recordings of Klaus Schulze, the quality is clear and very listenable.

Track Details:

Bremen FM Circa 1977
Similar to one of the BRT Studio pieces of music - 16.08

Home studio demos with Günther Schickert, Hambuhren 26/09/1975
Klaus Schulze (Electronics), Günther Schickert (Acoustic Guitar, voice)
The Works states "musically, nothing worth to mention happened"
- My opinion is it's a bit better than that.

Track One - 12.14
Track Two - 8.02
Track Three - 20.55