Package Summary Overview Summary

### class:Sequence [NONE]
-     public class Sequence
      extends Object
A `Sequence` is a data structure containing musical information (often an entire song or composition) that can be played back by a `Sequencer` object. Specifically, the `Sequence` contains timing information and one or more tracks. Each `track` consists of a series of MIDI events (such as note-ons, note-offs, program changes, and meta-events). The sequence's timing information specifies the type of unit that is used to time-stamp the events in the sequence. A `Sequence` can be created from a MIDI file by reading the file into an input stream and invoking one of the `getSequence` methods of `MidiSystem`. A sequence can also be built from scratch by adding new `Tracks` to an empty `Sequence`, and adding `MidiEvent` objects to these `Tracks`. See Also: `Sequencer.setSequence(java.io.InputStream stream)` , `Sequencer.setSequence(Sequence sequence)` , `Track.add(MidiEvent)`, `MidiFileFormat`

### field:PPQ [NONE]
- #### PPQ
      public static final float PPQ
The tempo-based timing type, for which the resolution is expressed in pulses (ticks) per quarter note. See Also: `Sequence(float, int)` , Constant Field Values

### field:SMPTE_24 [NONE]
- #### SMPTE_24
      public static final float SMPTE_24
The SMPTE-based timing type with 24 frames per second (resolution is expressed in ticks per frame). See Also: `Sequence(float, int)` , Constant Field Values

### field:SMPTE_25 [NONE]
- #### SMPTE_25
      public static final float SMPTE_25
The SMPTE-based timing type with 25 frames per second (resolution is expressed in ticks per frame). See Also: `Sequence(float, int)` , Constant Field Values

### field:SMPTE_30DROP [NONE]
- #### SMPTE_30DROP
      public static final float SMPTE_30DROP
The SMPTE-based timing type with 29.97 frames per second (resolution is expressed in ticks per frame). See Also: `Sequence(float, int)` , Constant Field Values

### field:SMPTE_30 [NONE]
- #### SMPTE_30
      public static final float SMPTE_30
The SMPTE-based timing type with 30 frames per second (resolution is expressed in ticks per frame). See Also: `Sequence(float, int)` , Constant Field Values

### field:divisionType [NONE]
- #### divisionType
      protected float divisionType
The timing division type of the sequence. See Also: `PPQ`, `SMPTE_24`, `SMPTE_25`, `SMPTE_30DROP`, `SMPTE_30`, `getDivisionType()`

### field:resolution [NONE]
- #### resolution
      protected int resolution
The timing resolution of the sequence. See Also: `getResolution()`

### field:tracks [NONE]
- #### tracks
      protected Vector<Track> tracks
The MIDI tracks in this sequence. See Also: `getTracks()`

### constructor:Sequence(float, int) [NONE]
- #### Sequence
      public Sequence(float divisionType,
                      int resolution)
               throws InvalidMidiDataException
Constructs a new MIDI sequence with the specified timing division type and timing resolution. The division type must be one of the recognized MIDI timing types. For tempo-based timing, `divisionType` is PPQ (pulses per quarter note) and the resolution is specified in ticks per beat. For SMTPE timing, `divisionType` specifies the number of frames per second and the resolution is specified in ticks per frame. The sequence will contain no initial tracks. Tracks may be added to or removed from the sequence using `createTrack()` and `deleteTrack(javax.sound.midi.Track)`. Parameters: `divisionType` - the timing division type (PPQ or one of the SMPTE types) `resolution` - the timing resolution Throws: `InvalidMidiDataException` - if `divisionType` is not valid See Also: `PPQ`, `SMPTE_24`, `SMPTE_25`, `SMPTE_30DROP`, `SMPTE_30`, `getDivisionType()`, `getResolution()`, `getTracks()`

### constructor:Sequence(float, int, int) [NONE]
- #### Sequence
      public Sequence(float divisionType,
                      int resolution,
                      int numTracks)
               throws InvalidMidiDataException
Constructs a new MIDI sequence with the specified timing division type, timing resolution, and number of tracks. The division type must be one of the recognized MIDI timing types. For tempo-based timing, `divisionType` is PPQ (pulses per quarter note) and the resolution is specified in ticks per beat. For SMTPE timing, `divisionType` specifies the number of frames per second and the resolution is specified in ticks per frame. The sequence will be initialized with the number of tracks specified by `numTracks`. These tracks are initially empty (i.e. they contain only the meta-event End of Track). The tracks may be retrieved for editing using the `getTracks()` method. Additional tracks may be added, or existing tracks removed, using `createTrack()` and `deleteTrack(javax.sound.midi.Track)`. Parameters: `divisionType` - the timing division type (PPQ or one of the SMPTE types) `resolution` - the timing resolution `numTracks` - the initial number of tracks in the sequence Throws: `InvalidMidiDataException` - if `divisionType` is not valid See Also: `PPQ`, `SMPTE_24`, `SMPTE_25`, `SMPTE_30DROP`, `SMPTE_30`, `getDivisionType()`, `getResolution()`

### method:getDivisionType() [NONE]
- #### getDivisionType
      public float getDivisionType()
Obtains the timing division type for this sequence. Returns: the division type (PPQ or one of the SMPTE types) See Also: `PPQ`, `SMPTE_24`, `SMPTE_25`, `SMPTE_30DROP`, `SMPTE_30`, `Sequence(float, int)` , `MidiFileFormat.getDivisionType()`

### method:getResolution() [NONE]
- #### getResolution
      public int getResolution()
Obtains the timing resolution for this sequence. If the sequence's division type is PPQ, the resolution is specified in ticks per beat. For SMTPE timing, the resolution is specified in ticks per frame. Returns: the number of ticks per beat (PPQ) or per frame (SMPTE) See Also: `getDivisionType()`, `Sequence(float, int)` , `MidiFileFormat.getResolution()`

### method:createTrack() [NONE]
- #### createTrack
      public Track createTrack()
Creates a new, initially empty track as part of this sequence. The track initially contains the meta-event End of Track. The newly created track is returned. All tracks in the sequence may be retrieved using `getTracks()`. Tracks may be removed from the sequence using `deleteTrack(javax.sound.midi.Track)`. Returns: the newly created track

### method:deleteTrack(javax.sound.midi.Track) [NONE]
- #### deleteTrack
      public boolean deleteTrack(Track track)
Removes the specified track from the sequence. Parameters: `track` - the track to remove Returns: `true` if the track existed in the track and was removed, otherwise `false` See Also: `createTrack()`, `getTracks()`

### method:getTracks() [NONE]
- #### getTracks
      public Track[] getTracks()
Obtains an array containing all the tracks in this sequence. If the sequence contains no tracks, an array of length 0 is returned. Returns: the array of tracks See Also: `createTrack()`, `deleteTrack(javax.sound.midi.Track)`

### method:getMicrosecondLength() [NONE]
- #### getMicrosecondLength
      public long getMicrosecondLength()
Obtains the duration of this sequence, expressed in microseconds. Returns: this sequence's duration in microseconds

### method:getTickLength() [NONE]
- #### getTickLength
      public long getTickLength()
Obtains the duration of this sequence, expressed in MIDI ticks. Returns: this sequence's length in ticks See Also: `getMicrosecondLength()`

### method:getPatchList() [NONE]
- #### getPatchList
      public Patch[] getPatchList()
Obtains a list of patches referenced in this sequence. This patch list may be used to load the required `Instrument` objects into a `Synthesizer`. Returns: an array of `Patch` objects used in this sequence See Also: `Synthesizer.loadInstruments(Soundbank, Patch[])`