Play Multiple Sounds Using Soundplayer

Play multiple sounds using SoundPlayer

You'll need to use DirectX (DirectSound) or some similar API that is designed to allow the playing of multiple sounds at the same time.

Playing multiple wav files with SoundPlayer() without the sounds overlapping

If you can afford stopping your main thread, you can use

SoundPlayer.PlaySync()

that loads and plays the .wave file on the calling thread.

.NET SoundPlayer.PlaySync() documentation

Play two sounds simultaneusly

Reference PresentationCore and WindowsBase and try this...

var p1 = new System.Windows.Media.MediaPlayer();
p1.Open(new System.Uri(@"C:\windows\media\tada.wav"));
p1.Play();

// this sleep is here just so you can distinguish the two sounds playing simultaneously
System.Threading.Thread.Sleep(500);

var p2 = new System.Windows.Media.MediaPlayer();
p2.Open(new System.Uri(@"C:\windows\media\tada.wav"));
p2.Play();

EDIT
I received a downvote probably because at first glance this looks like it will play the second sound after the first is finished. It doesn't, they are played by windows asynchronously. The sleep is there so if you test this code verbatim you can hear the sounds play together, it wouldn't be noticeable without the delay since they are the same sound.

This code demonstrates the two sounds playing on separate threads on top of each other, which is sort of pointless since the playback doesn't block anyway

new System.Threading.Thread(() => {
        var c = new System.Windows.Media.MediaPlayer();
        c.Open(new System.Uri(@"C:\windows\media\tada.wav"));
        c.Play();
    }).Start();

System.Threading.Thread.Sleep(500);

new System.Threading.Thread(() => {
        var c = new System.Windows.Media.MediaPlayer();
        c.Open(new System.Uri(@"C:\windows\media\tada.wav"));
        c.Play();
    }).Start();

http://msdn.microsoft.com/en-us/library/system.windows.media.mediaplayer.stop.aspx
The class also has the control you need to stop playback

Is it possible to play 2 sounds back to back using SoundPlayer?

Play them on a different thread:

    private void button1_Click(object sender, EventArgs e)
    {
        // ...
        jouerSon(new String[] { "_" + nbre1, operateur, "_" + nbre2, "equal" });
        // ...
    }

    public void jouerSon(String[] sons)
    {
        Task t = new Task(() =>
        {
            System.Media.SoundPlayer player = new System.Media.SoundPlayer();
            foreach (String son in sons)
            {
                player.Stream = Properties.Resources.ResourceManager.GetStream(son);
                player.PlaySync();
            }    
        });
        t.Start();
    }

Or possibly something more specifically tailored, like this:

    private void button1_Click(object sender, EventArgs e)
    {
        // ...
        jouerSon(nbre1, operateur, nbre2);
        // ...
    }

    public void jouerSon(string nbre1, string operateur, string nbre2)
    {
        Task t = new Task(() =>
        {
            System.Media.SoundPlayer player = new System.Media.SoundPlayer();
            player.Stream = Properties.Resources.ResourceManager.GetStream("_" + nbre1);
            player.PlaySync();
            player.Stream = Properties.Resources.ResourceManager.GetStream(operateur);
            player.PlaySync();
            player.Stream = Properties.Resources.ResourceManager.GetStream("_" + nbre2);
            player.PlaySync();
            player.Stream = Properties.Resources.ResourceManager.GetStream("equal");
            player.PlaySync();
        });
        t.Start();
    }

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