So, how is this feature meant to be applied?
Suppose I have a divisi section, and in my VST plug-in, I’ve got four samples loaded: MIDI channels 1 and 2 are meant for the upper divisi staff, and MIDI channels 3 and 4 are meant for the lower divisi staff. Channels 1 and 3 represent numerous keyswitched samples, and channels 2 and 4 represent samples that are not available among the keyswitched sounds.
I understand defining a relative switch in the expression map editor to effect a change from channel 1 to 2, and from channel 3 to 4, but how do I instruct the divisi staves to get back to their respective channels of 1 and 3? Obviously, I can’t use absolute channel changes, because that would cause either the upper or lower divisi staff to employ the same channel as the other staff.