IDirectSound::SetSpeakerConfig
HRESULT SetSpeakerConfig(DWORD dwSpeakerConfig);
Specifies the speaker configuration of the DirectSound object.
·Returns DS_OK if successful, or one of the following error values otherwise:
dwSpeakerConfig
Speaker configuration of the specified DirectSound object. This parameter can be one of the following values:
The speakers are headphones.
The speakers are monaural.
The speakers are quadraphonic.
The speakers are stereo (default value).
The speakers are surround sound.