1. Press MULTI to enter 'multi' mode.
The patch number should now start with 'M'.
2. Press PART +/- to change channel/part.
Suppose you are on PART 1 (for example)
3. Hold MULTI and press SINGLE
Now you can select which patch you want to assign to the channel/part.
Remember that
PART 1 = MIDI CHANNEL 1
PART 2 = MIDI CHANNEL 2
PART 3 = MIDI CHANNEL 3
etc etc etc.
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Each part can be ON or OFF.
PartEnable is in the first option in the CTRL menu when in multi-mode.
This is how it works on my VB.
Multi mode had me seriously confused and so I just didn't bother with it. The simple solution was just to sit down, take my time and figure it out with the aid of the manual.
Download the manual here...
http://www.access-music.de/downloads...irusc&file=314
Seriously - read all of the manual.
That really is all there is to it.