IDirectSoundBuffer8::SetVolume Method
[The feature associated with this page, DirectSound, is a legacy feature. It has been superseded by WASAPI and Audio Graphs. Media Casting have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Media Casting instead of DirectSound, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The SetVolume method sets the attenuation of the sound.
Syntax
HRESULT SetVolume(
LONG lVolume
)
Parameters
- lVolume
Attenuation, in hundredths of a decibel (dB).
Return Value
If the method succeeds, the return value is DS_OK. If the method fails, the return value may be one of the following error values:
| Return code |
| DSERR_CONTROLUNAVAIL |
| DSERR_GENERIC |
| DSERR_INVALIDPARAM |
| DSERR_PRIOLEVELNEEDED |
Remarks
Allowable values are between DSBVOLUME_MAX (no attenuation) and DSBVOLUME_MIN (silence). These values are defined in Dsound.h as 0 and �10,000 respectively. The value DSBVOLUME_MAX represents the original, unadjusted volume of the stream. The value DSBVOLUME_MIN indicates an audio volume attenuated by 100 dB, which, for all practical purposes, is silence. DirectSound does not support amplification.
Requirements
Header: Declared in DSound.h.
Library: Use Dsound3d.dll.