Preface by Jim Henry:
Most of the time you will be able to connect keyboards without needing to really understand how MIDI works or what MIDI messages the keyboards are sending. However, if things don't just fall into place you will need to dig into the MIDI messages produced by your keyboards to make the settings in the Miditzer necessary to recognize input from your keyboards. Rick's "MIDI for Virtual Organ" document provides basic information about how MIDI works to help you if you find yourself in this situation. Thanks for doing this Rick.
I have completely re-structured and extended the "MIDI for Virtual Organ" document I had started a couple of years ago.http://www.tosa-qld.org/VTPO/docs/Simple_MIDI_for_Virtual_Organ.pdf
Please take a look at this document. I welcome any feedback, comments, revisions or corrections.