Playing Sound in Java after a while stop working

Question

I have implemented a simple Java sound player (.wav) that works well, except that after playing 50-60 sounds it just stops working.

The code is similar to Playing .mp3 and .wav in Java?, but I will post mine here anyway:

import java.io.BufferedInputStream;
import java.io.InputStream;
import java.net.URL;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;

public class NewWavPlayer {
    private URL url;
    private AudioInputStream audio;

    public NewWavPlayer(URL url) {
        this.url = url;
    }

    public void play() {
          try
          {
            InputStream audioSrc = url.openStream();
            InputStream bufferedIn = new BufferedInputStream(audioSrc);
            audio = AudioSystem.getAudioInputStream(bufferedIn);            
            Clip clip = AudioSystem.getClip();
            clip.open(audio);
            clip.start();
          } catch(Exception e) { 
              System.err.println(e);
          }
    }
}

The error that I get after a while is:

javax.sound.sampled.LineUnavailableException: line with format PCM_SIGNED 44100.0 Hz, 16 bit, mono, 2 bytes/frame, little-endian not supported.

or

javax.sound.sampled.LineUnavailableException: line with format PCM_UNSIGNED 22050.0 Hz, 8 bit, mono, 1 bytes/frame,  not supported.

But it does not make sense, because the same sound was played before (or other sounds that already played correctly). I'm running it on a Linux Ubuntu 15.04, and other users experienced the same with other SOs.

I have tried reimplementing it with threads, but I got the same error. I would like to know which steps should I take next.

score 0 · Answer 1 · answered Nov 20 '15 at 05:44

0

One of the things that I see is you are not closing your InputStreams. You may have run out of handles. Close the input streams in a finally clause i.e.

public void play() {
        InputStream audioSrc = null;
        InputStream bufferedIn = null;
      try {
        audioSrc = url.openStream();
        bufferedIn = new BufferedInputStream(audioSrc);
        audio = AudioSystem.getAudioInputStream(bufferedIn);            
        Clip clip = AudioSystem.getClip();
        clip.open(audio);
        clip.start();
      } catch(Exception e) { 
          System.err.println(e);
      } finally {
          if (bufferedIn != null) {
              bufferedIn.close();
          }
          if (audioSrc != null) {
              audioSrc.close();
          }
}

You may have to restart your system if your OS has run out of handles. The above will ensure it doesn't happen again.

Hope this helps!

answered Nov 20 '15 at 05:44

Kabir

860
5
11

Or you could just make your life simpler and use [The try-with-resources Statement](https://docs.oracle.com/javase/tutorial/essential/exceptions/tryResourceClose.html) – MadProgrammer Nov 20 '15 at 05:51
This is a nice tip, but unfortunately it does not worked for me. The error persists. When I run again the app (via Eclipse or as a .jar outside) it works again, until it suddenly stops after reproducing the sound around 50-60 times (I counted). – Chaotic Nov 20 '15 at 05:52
It does sound like your OS is running out of handles. I would recommend to add the finally clauses, reboot and see if the problem exists. At worst, that would eliminate this theory. Just a suggestion :) – Kabir Nov 20 '15 at 05:58

score 0 · Accepted Answer · edited May 23 '17 at 12:34

I find the problem with the code. After some research I discovered that closing the Clip in a listener is the way to go. I got the code from here: https://stackoverflow.com/a/17277981/3552500

final Clip clip = AudioSystem.getClip();
clip.addLineListener(new LineListener() {
    @Override
    public void update(LineEvent event) {
        if (event.getType() == LineEvent.Type.STOP)
            clip.close();
    }
});

Playing Sound in Java after a while stop working

2 Answers2