des ensembles avec Roland Christen

Bands:
Peter Waters;
John Voirol;
Esther Bächlin;
Simon Ester;
Felix Utzinger;
Phillippe Mall;
Dave Doran;
Markus Portenier;
Laslo Spiro; Spiro/Giacopuzzi Projekt; Sabine Fiegl;
LillyThornton;
Szilla;
Blue Exercise;
CarloSchöb;
Bächlin-Schenker-Christen;
Basssax;
Toni Eberle Group; u.a.
Discographie:
Szilla-Milano(1997);
Spiro/Giacopuzzi(1986);
Proximal Factory(2002);
Ursula Amsler(1992);
Back to Back(1990);
Just Two(1993);Basssax;
Chor MTS(1997);
Blue Exercise-Live(2000);
Blue Exercise-Landeier(2005)