The IDirectSound3DListener::GetDopplerFactor method retrieves the current Doppler effect factor.
HRESULT GetDopplerFactor(
LPD3DVALUE lpflDopplerFactor
);
If the method succeeds, the return value is DS_OK.
If the method fails, the return value may be DSERR_INVALIDPARAM.
The Doppler factor has a range of DS3D_MINDOPPLERFACTOR (no Doppler effects) to DS3D_MAXDOPPLERFACTOR (as currently defined, 10 times the Doppler effects found in the real world). The default value is DS3D_DEFAULTDOPPLERFACTOR (1.0). For additional information, see Doppler Factor.
Windows NT: Use version 5.0 or later.
Windows: Use Windows 95 or later. Available as a redistributable for Windows 95.
Windows CE: Unsupported.
Header: Declared in dsound.h.
Import Library: Use dsound.lib.
IDirectSound3DListener::SetDopplerFactor