STUMM was the duo of Detlef Funder and Bernd Sevens who both would become pivotal figures in the tape underground movement of West-Germany, when they launched the SDV label in 1986. Individually they went on to produce boundary defying works as Konrad Kraft and Seventh Day respectively. The material on this album was recorded by Funder and Sevens quite casually in 1980 in a rehearsal studio in the centre of Düsseldorf. Right from the beginning the two young musicians incorporated the atmosphere of the space in order to document the process of their sound experiments on a 4-track tape machine. For those recording sessions, which are now released for the first time ever on vinyl and download, Funder and Sevens managed to get their hands on a very rudimentary set of equipment consisting of merely a Korg MS 20 synth, a Roland CR 78 drum machine, a few electronic effects and a drum kit.