
Hello Edmunsson,
Having no knowledge about the Viscount 40 organ it is hard to guide you exactly, but I'm assuming that your console is "MIDI ready", meaning that it has a MIDI out and MIDI in connector (and sometimes a MIDI thru). The important one is the MIDI out.
If you check your console User manual, you should find a section about MIDI implementation who will explain in detail how MIDI is implemented on your console.
In summary
- Read in the Hauptwerk Installation and User Guide (a copy was installed on your computer desktop when you installed Hauptwerk) at least the sections "Prerequisites page 14+, Installation Background p21+, Quick start p37+
- You will need to connect your console (MIDI OUT) to the computer using a MIDI to USB cable, or to a MIDI/Audio interface using a MIDI cable (console MIDI out to Interface MIDI IN).
- On your console you may have some stops labelled MIDI to GREAT, MIDI to SWELL to activate MIDI on your console so the division(s) transmit(s) MIDI messages when pressing keys on the keyboards. Other organs have options who must be set to ON (MIDI ON) in their menu configuration system. Again your user manual should guide you about setting up your console.
Hope that helps.