Nachtprisma Hexaphonisches Sonarium - Soundscapes Für Stereoanlage Ghettoblaster Und Walkman

On the cassettes side A is backed with side D, B with E and C with F.
The cassette boxes are glued together in a triangle. Each cassettes has printed foils as inlays with the main title written in different langueges on each. They come with a folded yellow sheet with an essay on the music and how to use it.
The cassettes can be used in any combination and should be played through six speakers to create a sonic ambience to walk through.