Experimentalstudio des Südwest-Rundfunks, Freiburg

Johann-Strauss-Ensemble, Munich

Tonstudio der Staatsoper, Stuttgart

Nokia - Night of the Proms, P.S.E. Belgium

Studio VANDERLINDENgeluid, Rossum, Netherlands

Clair Brothers Audio Systems, Lititz PA, USA

Quatuor Bozzini, Montréal, Canada

Helmut Lipsky,violin, Montréal

Jean René, viola, Montréal

Wendy Heiligenberg, violin, Adelaide, Australia

Roman Patkoló, double bass, Zurich, Switzerland

Florian Feuser, double bass, New York, N.Y. USA

and others