playing midi files in java3d

Engines, Libraries and Tools Java 3D
#1

hi, i’ve tried to play a midi sound file in J3d but i got an error as result.

Here is the code:


import javax.media.j3d.*;
import com.sun.j3d.utils.universe.*;

class TestSound
{
      public static void main(String[] args)
      {      
            String path = "file:myMusicFile.mid";
            
            SimpleUniverse u = new SimpleUniverse();
            u.getViewer().createAudioDevice();
            
            MediaContainer media = new MediaContainer(path);
            BackgroundSound sound = new BackgroundSound(media, 1, 10, false, false, true, new BoundingBox(), 1);
            
            BranchGroup bg = new BranchGroup();
            bg.addChild(sound);
            
            u.addBranchGraph(bg);
      }
}

And i get this error:


java.lang.ClassCastException
      at com.sun.j3d.audioengines.headspace.J3DHaeStream.getSampleRate(J3DHaeStream.java:1035)
      at com.sun.j3d.audioengines.headspace.HeadspaceMixer.prepareSound(HeadspaceMixer.java:441)
      at javax.media.j3d.SoundScheduler.attachSoundData(SoundScheduler.java:2963)
   ...

It works perfectly with a .au file but doesn’t with midi ones. Have i missed something?