IAMAudioInputMixer::put_Mono method (strmif.h)

Article
02/22/2024

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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_Mono method combines all channels into a mono signal.

Syntax

HRESULT put_Mono(
  [in] BOOL fMono
);

Parameters

[in] fMono

Specifies mono or multichannel. Use one of the following values.

Value	Description
TRUE	Mono
FALSE	Multichannel

Return value

Returns an HRESULT value. Possible values include the following.

Return code	Description
E_FAIL	Error setting mono control.
S_OK	Success.

Remarks

In mono mode, a stereo recording of this input will have the same data in both channels. The result will be a mixture of the left and right signals.

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