DirectSoundOut doesn't work

[dugarenko]

I want to use headphones to play audio but it doesn't work, below is the code:
`
[Test]
[Category("IntegrationTest")]
public void PlayFileAudioToDevice_Headphones()
{
string ID = "{0.0.0.00000000}.{5776c80a-d3d3-428f-92b8-c2ae4311a78c}";
string filePath = @"C:\audio.wav";

var deviceInfo = DirectSoundOut.Devices.First(x => x.ModuleName == ID);
var reader = new WaveFileReader(filePath);

using (var dso = new DirectSoundOut(deviceInfo.Guid))
{
	Exception ex = null;
	dso.PlaybackStopped += (s, e) => { ex = e.Exception; };
	dso.Init(reader);
	dso.Play();

	while (dso.PlaybackState == PlaybackState.Playing)
	{
		Thread.Sleep(1000);
	}

	if (ex != null)
	{
		Debug.WriteLine(ex.Message);
		throw ex;
	}
}

}
`

This can be fixed by making a small tweak to [Create SecondaryBuffer]:

`
bufferDesc2.dwReserved = 0;
//GCHandle handleOnWaveFormat = GCHandle.Alloc(waveFormat, GCHandleType.Pinned); // Ptr to waveFormat
//bufferDesc2.lpwfxFormat = handleOnWaveFormat.AddrOfPinnedObject(); // set Ptr to waveFormat
bufferDesc2.lpwfxFormat = WaveFormat.MarshalToPtr(waveFormat);
bufferDesc2.guidAlgo = Guid.Empty;

// Create SecondaryBuffer
directSound.CreateSoundBuffer(bufferDesc2, out soundBufferObj, IntPtr.Zero);
secondaryBuffer = (IDirectSoundBuffer)soundBufferObj;
//handleOnWaveFormat.Free();
`