| ControllerEventListener | 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. | 
| Instrument | An instrument is a sound-synthesis algorithm with certain parameter settings,
 usually designed to emulate a specific real-world musical instrument or to
 achieve a specific sort of sound effect. | 
| InvalidMidiDataException | An InvalidMidiDataExceptionindicates that inappropriate MIDI data
 was encountered. | 
| MetaEventListener | The  MetaEventListener interface should be implemented by classes
 whose instances need to be notified when a  Sequencer has processed a
  MetaMessage. | 
| MetaMessage | A  MetaMessage is a  MidiMessage that is not meaningful to
 synthesizers, but that can be stored in a MIDI file and interpreted by a
 sequencer program. | 
| MidiChannel | A MidiChannelobject represents a single MIDI channel. | 
| MidiDevice | MidiDeviceis the base interface for all MIDI devices.
 | 
| MidiDevice.Info | A  MidiDevice.Info object contains assorted data about a
  MidiDevice, including its name, the company who created it, and
 descriptive text. | 
| MidiEvent | MIDI events contain a MIDI message and a corresponding time-stamp expressed
 in ticks, and can represent the MIDI event information stored in a MIDI file
 or a  Sequence object. | 
| MidiFileFormat | A MidiFileFormatobject encapsulates a MIDI file's type, as well as
 its length and timing information. | 
| MidiMessage | MidiMessageis the base class for MIDI messages.
 | 
| MidiUnavailableException | A MidiUnavailableExceptionis thrown when a requested MIDI component
 cannot be opened or created because it is unavailable. | 
| Patch | A Patchobject represents a location, on a MIDI synthesizer, into
 which a single instrument is stored (loaded). | 
| Receiver | A  Receiver receives  MidiEvent objects and typically does
 something useful in response, such as interpreting them to generate sound or
 raw MIDI output. | 
| Sequence | A  Sequence is a data structure containing musical information (often
 an entire song or composition) that can be played back by a  Sequencer
 object. | 
| Sequencer | A hardware or software device that plays back a MIDI
  sequence is known as a sequencer . | 
| Sequencer.SyncMode | A SyncModeobject represents one of the ways in which a MIDI
 sequencer's notion of time can be synchronized with a master or slave
 device. | 
| ShortMessage | A ShortMessagecontains a MIDI message that has at most two data
 bytes following its status byte. | 
| Soundbank | A Soundbankcontains a set ofInstrumentsthat can be loaded
 into aSynthesizer. | 
| SoundbankResource | A  SoundbankResource represents any audio resource stored in a
  Soundbank. | 
| Synthesizer | A Synthesizergenerates sound. | 
| Track | A MIDI track is an independent stream of MIDI events (time-stamped MIDI data)
 that can be stored along with other tracks in a standard MIDI file. | 
| Transmitter |  | 
| VoiceStatus | A  VoiceStatus object contains information about the current status of
 one of the voices produced by a  Synthesizer. |