Frank Dommert - Kiefermusik (LP, Entenpfuhl emm LP 01, 1990)
These days Dommert is still around, mainly doing work for labels as Sonig and helping out Mouse On Mars, but in the late 80s he produced some music himself. Three tapes, which I don't have, one 7" with HNAS (which I think is on Mutant Sounds), and 'Kiefermusik', the LP he recorded for his Entenpfuhl label, which also released the previously posted C. Schulz album. Dommert's own music owes more to musique concrete in similar vein as Hajsch. They all were members of Kontakta, a short lived but highly infuential band from Cologne.