The
ControllerEventListener interface should be implemented
by classes whose instances need to be notified when a
Sequencer
has processed a requested type of MIDI control-change event.
To register a
ControllerEventListener object to receive such
notifications, invoke the
addControllerEventListener
method of
Sequencer,
specifying the types of MIDI controllers about which you are interested in
getting control-change notifications.
Invoked when a Sequencer has encountered and processed
a control-change event of interest to this listener. The event passed
in is a ShortMessage whose first data byte indicates
the controller number and whose second data byte is the value to which
the controller was set.