Unsupported control type: Volume

Question

Hi,
I have a problem. I want to set the volume for my Audio player, but it won't work. I'm getting the exception: Unsupported control type: Volumein this Line:
gain = (FloatControl)line.getControl(FloatControl.Type.VOLUME);
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.FloatControl;
import javax.sound.sampled.SourceDataLine;
public class Player extends Thread{
     static boolean weiter;
     private AudioInputStream in = null;
     private SourceDataLine line = null;
     static Thread player = new Thread();
     static FloatControl gainControl;
     FloatControl gain;
     public Player(AudioInputStream aui){      
          weiter = true;
     try{     
          in = aui;
     }catch (Exception d){
     AudioFormat format = in.getFormat();
     DataLine.Info info = new DataLine.Info(SourceDataLine.class,format);
     try {
          line = (SourceDataLine)AudioSystem.getLine(info);
          line.open(format);
          System.out.println("Lautst�rke : "+ gainControl);
          }catch (Exception e) {
          System.exit(-2);
     public void stopPlaying(){
          if(player!= null){
               player.interrupt();
          weiter = false;
          line.close();
     public void pause(){
          line.stop();
     public void resumeSound(){
          line.start();
     public void run(){
          startPlaying();
     public void startPlaying(){
          System.out.println("Thread start");
          while(weiter){
          int readBytes =0;
          byte[] data = new byte[20000];
          line.start();
          line.getControls();
          gain = (FloatControl)line.getControl(FloatControl.Type.VOLUME);
          gain.setValue(3f);
          do{
               try {
               readBytes = in.read(data,0,data.length);
          }catch (Exception e){
               //MainClass.logger.error(e.getMessage());
               System.exit(-3);
          if (readBytes!=-1) line.write(data, 0, readBytes);
          } while (readBytes != -1);
}I hope you can help!
Thanks a lot!

Answer 1

Hi,
I got the same trouble and used MASTER_GAIN control.
I can't understand why the VOLUME control does NOT work in this case. Does someone knows?
Moreover I have several line of this type and can't synchronize them (Exception tells that my mixer does NOT support synchronization).
I think that this is related to the same trouble.
Thanks for your help,
Regards,
Syl