Aerophone Pro AE-30: How do I assign the table keys or side keys to raise or lower the pitch by a semitone?

Perform the following procedure.

Press the [MENU] button.
Use the [–] [+] (</>) buttons to select System - “Key Function.”
Press the key to which you want to assign the function.
- The name of the key you pressed appears after “Key Function.”
Press the [MENU] button.
Use the [–] [+] (</>) buttons to select the function to assign.
Press the [SCENE] (▲/▼) buttons to return to the scene screen.