The script tells Kontakt: "When the user turns Knob A, increase the Volume of Group 1."
"Bob Dule" is a well-known name in the music production community, primarily associated with "repacks" or modified versions of Native Instruments software like Kontakt
Bobdule often leaves the 8 Kontakt macros unassigned. The best tutorial strategy is to assign Macro 1 to "Sample Start Modulation" and Macro 2 to "Pitch Drift." This turns a static piano into a warped, breathing instrument.