How can I check whether a sound is playing or not?

[Red XIII]

Hi guys.

I'm new to lwjgl and I have read the 2D/3D Asteroids Tutorial from the doucumentation site. Now I try to add and modify some things.
I added some background music, which starts playing when I enter the InGameState. But how can i check if a specific sound (my background music) is playing?

My current solution:

GameState:

public class MainMenuState implements IGameState {
	
	private Sound main;

	@Override
	public void enter(GameWindow window) {
		playMainMusic();
	}

	@Override
	public void init(GameWindow window) throws IOException {
		main = SoundLoader.get().getOgg("res/sound/main.ogg");
		main.setLength(177);
	}
	
	@Override
	public void update(GameWindow window, int delta) {
		playMainMusic();
	}

	private void playMainMusic() {
		if (!main.isPlaying()) {
			main.play(1f, 0.8f);
		}
	}

SoundObject:

public class Sound {
	
	private SoundLoader store;

	private int buffer;
	
	private int length = 0;
	
	private long startplaying;
	
	Sound(SoundLoader store, int buffer) {
		this.store = store;
		this.buffer = buffer;
	}
	
	public void play(float pitch, float gain) {
		startplaying = System.currentTimeMillis();
		store.playAsSound(buffer, pitch, gain);
	}
	
	public void setLength(int lengthInSec) {
		this.length = lengthInSec;
	}
	
	public int getLengthInSec() {
		return length;
	}
	
	public boolean isPlaying() {
		return startplaying + length * 1000 > System.currentTimeMillis();
	}
}

Basically I save the length of the sound in the soundobject and when i start the sound, i save the current time. Finally, if i want to know whether the sound is playing or not, i compare the current time with the starttime + length.

Is there a better way?

Cya,
Red XIII

[Cottonwood]

Cause I'd the same question I want to report here, though the thread is rather old.

I found a better solution here: http://lwjgl.org/wiki/index.php?title=Examples:SpaceInvaders_SoundManager

  public boolean isPlayingSound() {
    return AL10.alGetSourcei(sources[sources.length-1], AL10.AL_SOURCE_STATE) == AL10.AL_PLAYING;
  }