IBasicAudio::put_Volume method (control.h)
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The put_Volume method sets the volume (amplitude) of the audio signal.
Syntax
HRESULT put_Volume(
[in] long lVolume
);
Parameters
[in] lVolume
Specifies the volume, as a number from –10,000 to 0, inclusive. Full volume is 0, and –10,000 is silence. Multiply the desired decibel level by 100. For example, –10,000 = –100 dB.
Return value
Returns an HRESULT value. Possible values include the following.
| Return code | Description |
|---|---|
|
The underlying audio device returned an error. |
|
The value of lVolume is invalid. |
|
The filter graph does not contain an audio renderer filter. (Possibly the source does not contain an audio stream.) |
|
Success. |
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | control.h (include Dshow.h) |
| Library | Strmiids.lib |