Hans Koch
Scholl, Erismann, Niggli, Frith, Koch, Kowald - NIL (1995)
https://www.sendspace.com/file/al0tyq
Koch, Schütz, Wittwer, Marti, Demierre, Studer - Chockshut (1992)
https://www.sendspace.com/file/xjfbum
Koch-Schütz-Studer - Tales From 30 Unintentional Nights (2006)
https://www.sendspace.com/file/vbes4l
Fred Frith, Hans Koch - You Are Here (2017)