Prof. Natalia Gutman, Moscow; Prof. Saschko Gawrilow, Cologne; Prof. Dr. F. Eichhorn, Weimar; Robert Frank, Concert Master Mannheim/Bayreuth; Robin Brightman, LSO; David Schultheiss, C.M. Heilbronn; B. Rivinius, Saarbrücken;

Scharff instruments are played by: