The availability of alternate vent keys can greatly assist certain notes and passages. In particular, the simultaneous use of the upper vent key and the C sharp key greatly improves the performance of certain notes. For additional information download “Alternate Vent Keys for Contrabassoon”.
Auxiliary C Sharp Spatula by Top Vent
Auxiliary Top Vent Spatula below C Sharp Spatula
Auxiliary Spatula for Top Vent
Auxiliary C Sharp Spatula inset into Top vent Spatula