Vector control enables you to manage two or four completely different instruments all on the same MIDI channel. It does this by enabling Yoshimi's ability to run 'rows' of parts that cover MIDI channels 1 to 16.
Setting a CC for the X dimension will put Yoshimi in 32 part mode (if it was 16) Giving you two instrument control. Adding the Y dimension will bump this up to the full 64 (if it was less). However disabling these will not reduce the number of available parts, as this may have been set independently by some other feature such as Solo.
X and Y are the standard horizontal and vertical joystick axes.
Base Channel This sets the MIDI channel the vector will respond to.
(Options Menu)
Load Opens a filer window for installing previously saved vector data to this base channel.
Save Opens a filer window for saving the vector data on the current base channel.
Recent Opens a list of recently managed vector files.
Clear Ch Clears all the vector specific data from this base Channel.
Clear All Clears the vector specific data from all Channels.
X and Y controls are identical so we only describe X.
The upper button opens the current bank for selecting an instrument for the top row (parts 1 to 16)
The controller is the MIDI CC that this axis will respond to
The lower button is for selecting an instrument for the second row (17 to 32). This responds to the incoming CC in the reverse direction.
(features)
1 Off, Volume.
2 Off, Panning, Reverse Panning.
3 Off, Filter Cutoff, Reverse Cutoff.
4 Off, Modulation, Reverse Modulation.
Volume is in the same sense as the incoming CC, i.e. 0 is minimum and 127 is maximum. The other controls can be in either sense so you can have (say) modulation decreasing as the volume increases, so whichever of the two instruments is the quietest will have the greatest modulation depth.
The Y axis controls rows three (33 to 48) and four (49 to 64) respectively.
At the bottom is a field for entering a name for the complete vector.
Note
For any given CC, vector control takes priority over both MIDI learn and the Solo features.