Java won't play midi sequences. How can I get this to work?

[misternopps]

Hi,

I am running java on my mac OS X 10.4
I cannot create and play midi notes.
No error is thrown, but no sound comes from my speakers.
Is the problem in my code, or with my mac?
Thanks,
Jack

code:

import javax.sound.midi.*;
public class MiniMusicCmdLine {
static {
System.out.println("Initialising...");
}
public static void main(String[] args) {
MiniMusicCmdLine mini = new MiniMusicCmdLine();
String errorMsg = "Error - Main requires two intigers for input.";
try {
int instrument = 1;
int note = 12;
mini.play(instrument, note);
}
catch(Exception ex){
System.out.println(errorMsg);
}
System.out.println("End of programme");//wrap up
}

public void play(int instrument, int note){
try {
System.out.println("entering play()");
System.out.println("Initialising variables...");
Sequencer player = MidiSystem.getSequencer();
player.open();
Sequence seq = new  Sequence(Sequence.PPQ, 4);
Track track = seq.createTrack();
MidiEvent event = null;
ShortMessage first = new ShortMessage();
first.setMessage(192, 1, instrument, 1000);
MidiEvent changeInstrument = new MidiEvent(first, 1);
track.add(changeInstrument);

ShortMessage a = new ShortMessage();
a.setMessage(144, 1, note, 100);
MidiEvent noteOn = new MidiEvent(a, 1);
track.add(noteOn);

ShortMessage b = new ShortMessage();
b.setMessage(128, 1, note, 100);
MidiEvent noteOff = new MidiEvent(b, 1);
track.add(noteOff);
player.setSequence(seq);
System.out.println("Our control flow has reached open() and start().");
player.open();
player.start();
System.out.println("Now calling open(), start() five times...");
try {
for (int i = 1 ;i < 6; i++)
{
player.open();
player.start();
System.out.print(i + " ");
}
System.out.println("\n");
}
catch(Exception ex)
{
System.out.println("Error Caught while looping.  Throwing to play()");
throw(ex);
}
System.out.println("Calling stop() and  close() on our midi sequence");
player.stop();
player.close();
System.out.println("Exiting main()...");
}
catch(Exception ex) 
{
System.out.println("Error caught in play...");
ex.printStackTrace();
}
}
}

[DarrylBurke]

I don't know whether this applies to a Mac, but a soundbank isn't included in the Windows installation of the JRE, only with the JDK.

On Windows, the solution is to copy the file soundbank.gm from <JDK folder>\jre\lib\audio to <JRE folder>\lib\audio. Or download a soundbank (*.gm) and place it in the lib/audio folder.

db