it doesn't have anything to do with aftertouch -- it's the remote-control protocol, used by graphic editors (like my Vector Surgeon) to change parameter values in the VS's edit buffer. also, with MIDI parameter transmission turned on, the VS will send packets when you select parameters and move the data slider.
i think the VS was released before the MMA finalised the NRPN spec, and they got it backwards. the VS sends and expects parameter spec LSB, then parameter spec MSB, then data slider value LSB/MSB. the spec (correctly, IMHO, as the LSB is more likely to change without setting the MSB being required) says MSB first then LSB.
reversing the order would make a bunch of NRPN-sending control surfaces (Behringer BCR2000 etc etc) just work with the VS, where they don't at the moment.
On Thu, Jul 19, 2018 at 5:33 PM, stickfigurewhore@... [prophet_vs] <prophet_vs@yahoogroups.com> wrote:
I wonder if that is part of the "poly-at into channel" thing. It internally reroutes poly aftertouch messages to channel even in MIDI mode 4.