Bought a kit of circuit boards and software from a house in Kenmore which equip my Rodgers organ to be basically 4 MIDI keyboards (pedals plus 3 manuals). It cost about $600.

There is included excess capacity so that I can add buttons which generate additional MIDI signals to the Hauptwerk application. For example, for pistons.

Current MIDI Settings programming

Artisan Web Page (See 3-Manual kit)