Example usage for javax.sound.midi Track add

Introduction

In this page you can find the example usage for javax.sound.midi Track add.

Prototype

public boolean add(MidiEvent event) 

Source Link

Document

Adds a new event to the track.

Usage

From source file:Main.java

public static void main(String[] args) {
    JFrame frame = new JFrame();
    DrawPanel dp = new DrawPanel();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setContentPane(dp);//from w  w w.j av a  2s  .  c  o m
    frame.pack();
    frame.setLocationByPlatform(true);
    try {
        Sequence seq = new Sequence(Sequence.PPQ, 4);
        Track track = seq.createTrack();
        for (int i = 0; i < 120; i += 4) {
            int d = (int) Math.abs(new Random().nextGaussian() * 24) + 32;
            track.add(makeEvent(ShortMessage.NOTE_ON, 1, d, 127, i));
            track.add(makeEvent(ShortMessage.CONTROL_CHANGE, 1, 127, 0, i));
            track.add(makeEvent(ShortMessage.NOTE_OFF, 1, d, 127, i));
        }
        Sequencer sequencer = MidiSystem.getSequencer();
        sequencer.open();
        sequencer.setSequence(seq);
        sequencer.addControllerEventListener(dp, new int[] { 127 });
        sequencer.start();
    } catch (Exception e) {
        e.printStackTrace();
    }
    frame.setVisible(true);
}

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From source file:PlayerPiano.java

public static void addTrack(Sequence s, int instrument, int tempo, char[] notes)
        throws InvalidMidiDataException {
    Track track = s.createTrack(); // Begin with a new track

    // Set the instrument on channel 0
    ShortMessage sm = new ShortMessage();
    sm.setMessage(ShortMessage.PROGRAM_CHANGE, 0, instrument, 0);
    track.add(new MidiEvent(sm, 0));

    int n = 0; // current character in notes[] array
    int t = 0; // time in ticks for the composition

    // These values persist and apply to all notes 'till changed
    int notelength = 16; // default to quarter notes
    int velocity = 64; // default to middle volume
    int basekey = 60; // 60 is middle C. Adjusted up and down by octave
    boolean sustain = false; // is the sustain pedal depressed?
    int numnotes = 0; // How many notes in current chord?

    while (n < notes.length) {
        char c = notes[n++];

        if (c == '+')
            basekey += 12; // increase octave
        else if (c == '-')
            basekey -= 12; // decrease octave
        else if (c == '>')
            velocity += 16; // increase volume;
        else if (c == '<')
            velocity -= 16; // decrease volume;
        else if (c == '/') {
            char d = notes[n++];
            if (d == '2')
                notelength = 32; // half note
            else if (d == '4')
                notelength = 16; // quarter note
            else if (d == '8')
                notelength = 8; // eighth note
            else if (d == '3' && notes[n++] == '2')
                notelength = 2;//from w ww . ja  v  a  2s  . c  om
            else if (d == '6' && notes[n++] == '4')
                notelength = 1;
            else if (d == '1') {
                if (n < notes.length && notes[n] == '6')
                    notelength = 4; // 1/16th note
                else
                    notelength = 64; // whole note
            }
        } else if (c == 's') {
            sustain = !sustain;
            // Change the sustain setting for channel 0
            ShortMessage m = new ShortMessage();
            m.setMessage(ShortMessage.CONTROL_CHANGE, 0, DAMPER_PEDAL, sustain ? DAMPER_ON : DAMPER_OFF);
            track.add(new MidiEvent(m, t));
        } else if (c >= 'A' && c <= 'G') {
            int key = basekey + offsets[c - 'A'];
            if (n < notes.length) {
                if (notes[n] == 'b') { // flat
                    key--;
                    n++;
                } else if (notes[n] == '#') { // sharp
                    key++;
                    n++;
                }
            }

            addNote(track, t, notelength, key, velocity);
            numnotes++;
        } else if (c == ' ') {
            // Spaces separate groups of notes played at the same time.
            // But we ignore them unless they follow a note or notes.
            if (numnotes > 0) {
                t += notelength;
                numnotes = 0;
            }
        } else if (c == '.') {
            // Rests are like spaces in that they force any previous
            // note to be output (since they are never part of chords)
            if (numnotes > 0) {
                t += notelength;
                numnotes = 0;
            }
            // Now add additional rest time
            t += notelength;
        }
    }
}

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From source file:PlayerPiano.java

public static void addNote(Track track, int startTick, int tickLength, int key, int velocity)
        throws InvalidMidiDataException {
    ShortMessage on = new ShortMessage();
    on.setMessage(ShortMessage.NOTE_ON, 0, key, velocity);
    ShortMessage off = new ShortMessage();
    off.setMessage(ShortMessage.NOTE_OFF, 0, key, velocity);
    track.add(new MidiEvent(on, startTick));
    track.add(new MidiEvent(off, startTick + tickLength));
}

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