Hi Peter,

I'm no expert but I was wondering whether it could be something simple like changing the format from Technics to SMF or GM etc.

Or, are the volumes down to '0' on the keyboard?

Have you tried the Midi 'Thru' socket? Many moons ago I had a KN650, an Em10 Sound Module and PR900 Piano all linked via midi and the KN was linked via the 'Thru' socket and even when the piano was disconnected, it still quite happily played with the Sound Module. I cannot explain why this should be -but suspect it was just luck!

Hope you get your answer.

Audrey