When loading Halion Sonic SE or Aria Player, I can sample the sound using VST virtual keyboard but not my MIDI keyboard.
I believe if you make a selection in the score, you can then use the MIDI keyboard and it will choose the same channel as that instrument is currently set to use in HALion.
Not when I just make a selection. Only when I start entering notes via mouse or keyboard.
We’ll have to wait for Paul to weigh in, as he knows more about this than I do.