How to bind USB control knobs to adjust the volume on specific applications?

I want to control the volume level of 2 specific Windows Applications using my USB piano's control knobs (Spotify Premium discord). FIRST TRY - AutoHotkey. The KeyHistory does not detect any input from the USB piano, so I stopped there. SECOND TRY - 'MIDI Macros' - I use a 3rd party program called 'MIDI Macros' from mediachance.com - it has great functionality for binding hotkeys and running executables, but the scripting function is limited to mathematical operations and keystroke commands. Is AHK capable of handling this task? If not, where should I go from here? NOTE: I'm using Windows 11.

Question by Dominic Marchese on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.