The Master-Class www.pianoforte.best/ch04 offers you some seats in the cafeteria of the castle (Schloss 88, CH-3454 Sumiswald) and unlimited seats for LIVESTREAM.

The Kayserburg grand-piano KA-212 is being supplied by music store Kellenberger www.musikladen.be from Berne as general importer.

The pianists Gabriel Emanuel Arnold and Wolfgang Ellenberger are demonstrating the grand piano.