You’ve basically gotten it all right
There I found the option “learn cc” when I right clicked the knobs.
Yes, that’s it.
There are apparently two kinds of knobs, one is controlled by the horizontal touch and the other by the aftertouch when I click the “learn cc” option. I tried the “learn cc” and it kind of captures the aftertouch which kind of worked now although I still find something lacking… btw I am using cubase artist. I have also tried other presets like strings, flute and organ and all of them do not have aftertouch… >
I don’t know what you mean by “horizontal touch”… no keyboard has that (well, to be exact, the top keyboard of Yamaha’s GX1, from the 1970s, offered that, but that machine cost over $50,000 even then… I don’t suppose that is the keyboard you are using? )
If you are finding it “lacking”, might that be down to the way (i.e; the “curve”) that your keyboard is sending?
No, SysEx has nothing to do with this… aftertouch is a channel message . Here, it is simply that (most of) the presets in HALion Sonic SE are not set up to use aftertouch.