Off the Map
Sound Impressionen (Kopfhörer Demonstration) (LP)
1973 Dutch headphones demonstration record on Philips with field-recordings of sounds (birds, engines, street noises, etc.) and music (songs and orchestras).
Spectra In Sound (LP)
Original 1977 Dutch edition of hi-fi test album on Philips with a mix of classical and pop recordings of music by D-R-U-M, Randy Edelman, Letty De Jong, Paco De Lucía, Pepe Romero, Bach, Beethoven, Schubert, Mahler and Ravel among others.
Stereo Test Record (LP)
1981 technical audiophile record on Hi-Fi Sound with test sounds for diagnostic testing, cartridge alignment and system calibration of vinyl turntables. Cover eventually 'imitated' by Stereolab.