For line keys:
The default value of the line key 1-16 is 15, and the
default value of the line key 17-27 is 0.
For programable keys:
When X=12, the default value is 0 (NA).
When X=13, the default value is 0 (NA).
When X=14, the default value is 2 (Forward).
For ext keys:
When Y=1-60, the default value is 0 (NA).