Hi Sherry,

Here is a short section from the JABB manual.

“Vibrato Control: There are two controllers that affect vibrato. Aftertouch controls the intensity of the vibrato from no vibrato (Aftertouch = value of “0”) to exaggerated vibrato (Aftertouch = high number value.) Because both components of the vibrato are independently controllable the user can apply vibrato in a much more flexible and realistic fashion. The speed of the vibrato is controlled using cc17. Note that some keyboards, like those from M-Audio, have no Aftertouch function but can assign cc131 to a programmable slider which, in turn, will send Aftertouch data out to your computer.”

Best wishes,

Herbert