Getting the amplitude of a sound Clip

Question

Hi, I'm having problems with the javax.sound.sampled package, specifically, the Clip interface.
I want to get the current amplitude of a Clip object. I set up the Clip and then call getLevel () on it, but it returns -1 (i.e., it doesn't know how loud it is)
The Clip is set up fine, and it plays OK, I just need the volume level of it. (By the way, the Clip is created from a .wav file).
This is what I do at the moment:
try {
   // clipURL is the URL of the .wav file
   AudioInputStream inputStream = AudioSystem.getAudioInputStream (clipURL);
   DataLine.Info info = new DataLine.Info (Clip.class, inputStream.getFormat ());
   if (!AudioSystem.isLineSupported (info)) {
      System.out.println ("There are no installed mixers that support this file type. System exiting");
      System.exit (-1);
   try {
      clip = (Clip) AudioSystem.getLine (info);
      clip.open (inputStream);
   } catch (LineUnavailableException lue) {
      // Handle exception
} catch (UnsupportedAudioFileException usafe) {
   // Handle exception
} catch (IOException ioe) {
   // Handle exception
} catch (Exception e) {
   // Handle exception
}Once I get this far, I play the Clip and try to get the current amplitude:
clip.start ();
float clipLevel = clip.getLevel ();
clip.stop ();
clip.close ()All of the above works, except for the fact that clipLevel is always -1, when it should be between 0.0 and 1.0.
Any help would be much appreciated. Cheers.

Answer 1

This is a known bug, see:
http://developer.java.sun.com/developer/bugParade/bugs/4297101.html
If this issue is important to you, please add your vote. It was originally reported in 1999 and has not been resolved as of 1.4.