Add/Scale: In Logic Pro Velocity Processor MIDI plug-in Add/Scale, the plug-in scales, adds to, or reduces the values of incoming MIDI velocity messages.
Note Range Min and Note Range Max sliders (extended parameter): Click the disclosure triangle at the lower left to open the extended parameters. Move the sliders to set an input note range. Notes that fall within the input note range are processed (default range: 1–127). Notes outside the input note range are not processed.
Note: You can cross over the Input Min and Input Max sliders, which inverts the input note range behavior: note events that fall within the range are not processed and note events outside the range have their velocities processed.
Range Learn checkbox (extended parameter): Select to turn on Learn mode, then play a (low) key on your MIDI keyboard to set the Input Min value. Play a (high) key to set the Input Max value.
Once both keys have been played, Learn mode is automatically turned off, and the Range Learn checkbox is cleared.