Microsoft DirectX 9.0


The SetMode method sets the operation mode for 3-D sound processing.


  DWORD dwMode, 
  DWORD dwApply 



Flag specifying the 3-D sound processing mode to be set. The following flags are defined:

Value Description
DS3DMODE_DISABLE Processing of 3-D sound is disabled. The sound seems to originate from the center of the listener's head.
DS3DMODE_HEADRELATIVE Sound parameters (position, velocity, and orientation) are relative to the listener's parameters. In this mode, the absolute parameters of the sound are updated automatically as the listener's parameters change, so that the relative parameters remain constant.
DS3DMODE_NORMAL Normal processing. This is the default mode.


Value that specifies when the setting should be applied. This value must be one of the following:

Value Description
DS3D_DEFERRED Settings are not applied until the application calls the IDirectSound3DListener8::CommitDeferredSettings method. This allows the application to change several settings and generate a single recalculation.
DS3D_IMMEDIATE Settings are applied immediately, causing the system to recalculate the 3-D coordinates for all 3-D sound buffers.

Return Values

If the method succeeds, the return value is DS_OK.

If the method fails, the return value may be DSERR_INVALIDPARAM.


  Header: Declared in dsound.h

See Also