Heinz Holliger (oboe) Herman Krebbers (violin) Karl Schouten (viola) Jean Decroos (cello)
Bruno Hoffmann Glass Harmonica Aurele Nicolet Flute Heinz holliger Oboe Karl Schouten Viola Jean Decroos Violoncello
Heinz Holliger (oboe) Herman Krebbers (violin) Karl Schouten (viola) Judith de Munk-Gero (viola) Jean Decroos (cello)