The concept of this Musterhaus release is providing a series of samples of cassette recordings that Einstürzende Neubauten has amassed over the years.

As noted on the back of the album, in their earlier years every member of the band owned a cassette recorder and found it invaluable.

), tape noise experiments, answering machine recordings and nearly every interview they conducted during that time period.

Unruh dismantling a wardrobe in a Paris hotel room, to make his mattress provide more support.

Tracks 9 and 10 are recordings of one day of people entering and leaving Blixa Bargeld's 'Eisengrau' shop on Goltzstrasse 37.