I have a Steck Pedal Duo-Art Pianola. When I play a Duo-Art roll with
the 'Duo-Art' setting switched on, the bottom three notes and the
4th and 3rd notes from the top play even though they aren't meant to. 

Any ideas on what I could do?

Karl Juelg

 [ Duo-Art on/off switch
 [ https://www.mmdigest.com/Attachments/23/09/12/230912_040548_IMG_0183.jpeg 

 [ Steck Duo-Art Pianola
 [ https://www.mmdigest.com/Attachments/23/09/12/230912_040548_IMG_0096.jpeg