Parameters: pfield, value
The AddProcessor takes two parameters, one for pfield (positive integer > 0) and one for value (any number). When applied, it will add the user-defined value to the set pfield for all notes.
For example, if you have a SoundObject with notes for an instrument that uses p4 as its amplitude. If you have values for p4 within the range of 78 and 82, such as the following score:
i1 0 2 78 i1 + . 80 i1 + . 81 i1 + . 82
If an AddProcessor is used that was set to 4.4 for value 4 for pfield, your notes afterwards would be moved to the range of 82.4 to 86.4:
i1 0.0 0.5 82.4 i1 0.5 0.5 84.4 i1 1.0 0.5 85.4 i1 1.5 0.5 86.4
(The p2 and p3 times above are post-processing for a 2 second duration SoundObject with time behavior set to scale.)