Usar o XAudio2 para reproduzir um som

CoInitializeEx( NULL, COINIT_MULTITHREADED );

// Create an XAudio2 device.
DX::ThrowIfFailed( XAudio2Create( &m_pXAudio2, 0, XAUDIO2_USE_DEFAULT_PROCESSOR, NULL ) );

// Create an XAudio2 mastering voice, and store the result.
DX::ThrowIfFailed( m_pXAudio2->CreateMasteringVoice( &m_pMasteringVoice ) );  

// Read the .wav file.
WaveFile WaveFile;

// Append the file name and location to the end of the installation location.
WCHAR FilenameAndLocation[ 1024 ];
_snwprintf_s( FilenameAndLocation, _countof( FilenameAndLocation ), _TRUNCATE, L"%s%s", g_strCommonFileRoot, szFilename );

DX::ThrowIfFailed( WaveFile.Open( FilenameAndLocation ) );

// Read the format header.
BYTE header[64];
WAVEFORMATEX* pbWfx = reinterpret_cast<WAVEFORMATEX*>(header);

DX::ThrowIfFailed( WaveFile.GetFormat( pbWfx, sizeof(header) ) );

// Calculate the number of bytes and samples in the .wav file. 
DWORD cbWaveSize = WaveFile.GetDuration();

// Read the sample data into memory.
BYTE* pbWaveData = new BYTE[ cbWaveSize ];
DX::ThrowIfFailed( WaveFile.ReadSample( 0, pbWaveData, cbWaveSize, &cbWaveSize ) );  

std::wstring installFolder = Windows::ApplicationModel::Package::Current->InstalledLocation->Path->Data();  

// Play the .wav file by using a new XAudio2SourceVoice.
// Create the source voice.
DX::ThrowIfFailed( pXaudio2->CreateSourceVoice( &m_pSourceVoice, pbWfx, 0, XAUDIO2_DEFAULT_FREQ_RATIO, &m_VoiceContext ) );

// Submit the .wav sample data by using an XAUDIO2_BUFFER structure.
XAUDIO2_BUFFER buffer = {0};
buffer.pAudioData     = pbWaveData;
buffer.Flags          = XAUDIO2_END_OF_STREAM;
buffer.AudioBytes     = cbWaveSize;
buffer.pContext       = pbWaveData;

// Add the audio buffer to the voice input queue.
DX::ThrowIfFailed( m_pSourceVoice->SubmitSourceBuffer( &buffer ) );

// Play the next audio buffer in the queue.
DX::ThrowIfFailed( m_pSourceVoice->Start( 0 ) );  

// Determine whether the sound effect has been played to completion, and handle an appropriate termination.
XAUDIO2_VOICE_STATE state;
m_pSourceVoice->GetState( &state, XAUDIO2_VOICE_NOSAMPLESPLAYED );
if( state.BuffersQueued == 0 )
{
  // Destroy the current sound effect.
  m_pSourceVoice->DestroyVoice();
}