IAMAudioInputMixer::put_Loudness method (strmif.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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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_Loudness method enables or disables the loudness control.
Syntax
HRESULT put_Loudness(
[in] BOOL fLoudness
);
Parameters
[in] fLoudness
Specifies whether loudness is on or off. Use one of the following values.
| Value | Description |
|---|---|
| TRUE | Sets loudness on. |
| FALSE | Sets loudness off. |
Return value
If the method succeeds, it returns S_OK. Otherwise it returns an HRESULT error code.
Remarks
Loudness boosts the bass of low volume signals before they are recorded, to compensate for the fact that the ear does not hear quiet bass sounds as well as other sounds.
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 | strmif.h (include Dshow.h) |
| Library | Strmiids.lib |