I am using an M-Audio midi controller with CC131 assigned to to slider (no aftertouch on keys available).
I think that I am following the instructions correctly for brush stirring - hit and hold C#1 (midi note 37) and then I am nudging the assigned slider up then back to 0 to simulate pressing the key a little then backing off.
All I notice is an increase/decrease in volume of the stir as I move the slider up/down - I don't hear something that I would interprete as a change in direction of the stirring.
Can anyone show me the error of my ways?
Tom - is there any chance that you could post the midi file of the brush drum demo off the JABB website?