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Hi, I have a bug in execution when I try to get frequency through the IDirectSoundBuffer interface, I need the two interfaces IDirectSoundBuffer8 and IDirectSound3DBuffer, here after my setup function : class C3DSound{ public: HRESULT Setup(WCHAR *pwsFileName, IDirectMusicPerformance8 *pPerformance, IDirectMusicLoader8 *pLoader); private: // the performance this sound is associated with IDirectMusicPerformance8* m_pPerformance; // the loader to laod this sound wtih IDirectMusicLoader8* m_pLoader; // the segment for this sound IDirectMusicSegment8* m_pSegment; // segment state IDirectMusicSegmentState8 *m_pSegmentState; // the 3d audiopath for this sound IDirectMusicAudioPath8* m_p3DAudioPath; // the sound buffer for this sound - used to position sound in 3d space IDirectSound3DBuffer8* m_pDSB; IDirectSoundBuffer8* pDSB; // the listener for this sound // IDirectSound3DListener8* m_pListener; C3DSoundListener* m_pListener; } // sets up a sound HRESULT C3DSound::Setup(WCHAR *pwsFileName, IDirectMusicPerformance8* pPerformance, IDirectMusicLoader8* pLoader){ HRESULT hr; m_pPerformance = pPerformance; m_pLoader = pLoader; // load the soundfile if( FAILED( hr = m_pLoader->LoadObjectFromFile( CLSID_DirectMusicSegment, IID_IDirectMusicSegment8, pwsFileName, (LPVOID*) &m_pSegment ) ) ) return hr; // Download the segment's instruments to the synthesizer if (FAILED(hr = m_pSegment->Download( m_pPerformance ))) return hr; // by default don't repeat soundss if (FAILED(hr = m_pSegment->SetRepeats( 0 ))) return hr; // Create the 3D audiopath with a 3d buffer. // We can then play this segment through this audiopath (and hence the buffer) // and alter its 3D parameters. if (FAILED(hr = m_pPerformance->CreateStandardAudioPath( DMUS_APATH_DYNAMIC_3D, 64, TRUE, &m_p3DAudioPath ))) return hr; // Get the IDirectSound3DBuffer8 from the 3D audiopath if (FAILED(hr = m_p3DAudioPath->GetObjectInPath( DMUS_PCHANNEL_ALL, DMUS_PATH_BUFFER, 0, GUID_NULL, 0, IID_IDirectSound3DBuffer, (LPVOID*) &m_pDSB ))) return hr; // get the listener from the 3d audiopath if (FAILED(hr=m_p3DAudioPath->GetObjectInPath(0, DMUS_PATH_PRIMARY_BUFFER, 0, GUID_All_Objects, 0, IID_IDirectSound3DListener, (void **)&(m_pListener->m_Listener)))) return hr; DWORD dwBuffer = 0; if (FAILED(hr=m_p3DAudioPath->GetObjectInPath( DMUS_PCHANNEL_ALL, DMUS_PATH_BUFFER, dwBuffer, GUID_NULL, 0, IID_IDirectSoundBuffer8, (void**) &pDSB))) return hr; return S_OK; } and it is buguing when I try to get frequency by this code : LPDWORD pdwFrequency ; pDSB->GetFrequency(pdwFrequency ); I will be thankful if you can help me Fathya

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