Hi,

I don't know much about midi accordions (I use my Ketron module with a midi keyboard controller) or accordion playing techniques, but on "accordion mode" I think you can assign parts of the keyboard to certain midi channels.

The manual (available online at the Ketron Official site) explains this in quite a detailed way, on pages 77/78. Did you have a look at it? If this isn't enough to answer your questions, then you need help from an experienced midi accordionist!

Good luck,

-- José.