From the online help (doh!):

The Wizard also works with MIDI keyboard Thru channel input. To enable this feature, go to Options | [Preferences] and select the [Transpose] button. In the Settings for transposing songs when loaded or "Do it Now" dialog there is a setting to Use Wizard for THRU part.

When this checkbox is selected the MIDI input from your external keyboard will be sent to the Wizard. C/E/G/Bb notes will be mapped to chord tones and D/F/A/B notes will be passing tones.


These are NOT the notes I would have chosen, in that they aren't exactly as easy to find as top row/bottom row on an alphanumeric keyboard would be, but at least it can be done.