
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.

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.