int main(array<System::String ^> ^args)
{
  HRESULT hr = 0;
  IXAudio2* pIXAudio = NULL;
  IXAudio2MasteringVoice* pIMasterVoice = NULL;
  IXAudio2SubmixVoice* pISubmix = NULL;

  UINT32 Flags = 0;

#ifdef _DEBUG
  Flags = XAUDIO2_DEBUG_ENGINE;
#endif

  // Create XAudio2 object
  hr = XAudio2Create(&pIXAudio, Flags);

  if(FAILED(hr))
    return -1;

  // Create XAudio2 Mastering Voice
  hr = pIXAudio->CreateMasteringVoice(&pIMasterVoice);

  if(FAILED(hr))
  {
    // Give up and exit
    pIXAudio->Release();
    return -1;
  }

  // Create XAudio2 Submix Voice
  hr = pIXAudio->CreateSubmixVoice(&pISubmix, 2, 44100);

  if(FAILED(hr))
  {
    // Destroy Mastering voice
    pIMasterVoice->DestroyVoice();

    // Free XAudio2 object
    pIXAudio->Release();
  }

  XAUDIO2_FILTER_PARAMETERS xfp;
  xfp.Frequency = 0.2f;
  xfp.OneOverQ = 0.1f;
  xfp.Type = BandPassFilter;


  pISubmix->SetFilterParameters(&xfp);

  // clean up
  pISubmix->DestroyVoice();

  pIMasterVoice->DestroyVoice();

  pIXAudio->Release();

    return 0;
}