|Microsoft DirectX 9.0|
DirectSound uses the speaker configurationthat is, the position of the speakers relative to the listenerto optimize 3-D effects for the user's sound system.
In Windows® 98, Windows 2000, and later operating systems, the speaker configuration can be set by the user in Control Panel. An application can retrieve this value by using IDirectSound8::GetSpeakerConfig. Applications should not override the setting by calling IDirectSound8::SetSpeakerConfig, as this is a global setting that affects other users and applications.