This 2-CD set with a large selection of Gottfried Michael Koenig’s electronic works (BVHaast 9001/2) is part of the Acousmatrix history of electronic music series. The second release (with the same catalogue number) contains new digital masters, based on Kees Tazelaar’s transfers from the original master tapes.
More information can be found here:
https://www.discogs.com/Gottfried-Michael-Koenig-Klangfiguren-II-Essay-Terminus-I-II-Output-Funktionen/release/1891517