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MDPW for Java

Install

Note

Sequence

Chord

Music piece


Download
mdpw22.zip

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Install

Download mdpw22.zip and extract it. You will find mdpw.jar. Add the jar file to your Java development environment. There are at least three ways.
  • Use java, javac classpath argument.
  • Set CLASSPATH Environmental variable.
  • Put the jar file in jre/lib/ext folder(directory).

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How to make a Note

I will show you an example of only one note first. You will understand how to use "Player Class". The arguments of :mn represent pitch(0-127), duration(positive double), velocity(-64 - 63) and program number (0 - 127, 129) respectively.
import com.cwbp.mdpw.*;
public class tNote {
  public static void main(String[] a){
    // Create Player class
    Player p = new MIDIFilePlayer();
    // file name to output
    p.init("tNote.mid");
    // Set tempo
    p.setTempo(120);
    // Create one note and play
    p.play(new DataNote(60, 1, 0, 1));
    // Do write to the file.
    p.end();
  }
}

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How to make a Sequence

You can make a sequnece of notes by DataSequence class. Create a instance and add notes to it. If you omitt arguments of DataNote, the valeus of the note before are applied.
import com.cwbp.mdpw.*;
public class tSeq {
  public static void main(String[] a){
    Player p = new MIDIFilePlayer();
    // Create Sequence
    DataSequence s = new DataSequence();
    // Add notes to the sequence
    s.addElement(new DataNote(60, 1, 0, 0));//C
    s.addElement(new DataNote(62, 1));       //D
    s.addElement(new DataNote(64, 1));       //E
    // Write to a file
    p.init("tSeq.mid");
    p.setTempo(120);
    p.play(s);
    p.end();
  }
}

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How to make a Chord

You can make a chord by DataChord class. If you omit arguments of DataNote, the valeus of the note before are applied.
import com.cwbp.mdpw.*;
public class tChord {
  public static void main(String[] a){
    Player p = new MIDIFilePlayer();
    DataChord c = new DataChord();
    c.addElement(new DataNote(60, 1, 0, 0));//C
    c.addElement(new DataNote(64, 1));       //E
    c.addElement(new DataNote(67, 1));       //G
    p.init("tChord.mid");
    p.setTempo(120);
    p.play(c);
    p.end();
  }
}

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How to make a musical piece

You can make a musical piece by sequences and chords. Both can contain both. You can make a seqence as the melody, a sequence of chords as the accompaniment and a chord of those two. And you will find how to repeat by repeated invocation of play method of Player class.
import com.cwbp.mdpw.*;
public class tSample {
  public static void main(String[] a){
    Player p = new MIDIFilePlayer();
    DataChord c = new DataChord();           //Chord:C
    c.addElement(new DataNote(60, 2, 0, 0));
    c.addElement(new DataNote(64, 2));
    c.addElement(new DataNote(67, 2));
    DataSequence b = new DataSequence();     //Chord part
    b.addElement(c);
    b.addElement(c);
    DataSequence s = new DataSequence();     //Melody
    s.addElement(new DataNote(60, 1, 16, 0));
    s.addElement(new DataNote(62, 1));
    s.addElement(new DataNote(64, 1));
    s.addElement(new DataNote(64, 1, 0));    //Rest
    DataChord m = new DataChord();           //Phrase 1
    m.addElement(s);
    m.addElement(b);
    p.init("tSample.mid");
    p.setTempo(120);
    p.play(m);                              //Repeat 2 times
    p.play(m);
    p.end();
  }
}
Are you inspired? Enjoy Music Programing.
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