Play multiple sounds using SoundPlayer

Question

I\'m making a sampler program where each key from 1 to 9 will make a different sound. Everything works fine, but when I press two (or more) sounds at the same time, the seco

Answer 1

There is one simple way to play multiple sounds at once in C# or VB.Net. You will have to call the mciSendString() API Function to play each .wav file. You won't even have to do multi-threading, unless you are loop-playing. Here is a complete working example of a MusicPlayer class created using mciSendString().

// Sound api functions
[DllImport("winmm.dll")]
static extern Int32 mciSendString(string command, StringBuilder buffer, int bufferSize, IntPtr hwndCallback);

In the above function, the key is first parameter command. As long as you call two functions with a separate command name, they will play separately/simultaneously. This is what I did in one of my C# programs:

private void PlayWorker()
{
    StringBuilder sb = new StringBuilder();
    mciSendString("open \"" + FileName + "\" alias " + this.TrackName, sb, 0, IntPtr.Zero);
    mciSendString("play " + this.TrackName, sb, 0, IntPtr.Zero);
    IsBeingPlayed = true;
}

EDIT: Added link to a working example.