IAudioStreamVolume::SetChannelVolume method
The SetChannelVolume method sets the volume level for the specified channel in the audio stream.
Syntax
HRESULT SetChannelVolume( [in] UINT32 dwIndex, [in] const float fLevel );
Parameters
- dwIndex [in]
-
The channel number. If the stream format has N channels, the channels are numbered from 0 to N– 1. To get the number of channels, call the IAudioStreamVolume::GetChannelCount method.
- fLevel [in]
-
The volume level for the channel. Valid volume levels are in the range 0.0 to 1.0.
Return value
If the method succeeds, it returns S_OK. If it fails, possible return codes include, but are not limited to, the values shown in the following table.
| Return code | Description |
|---|---|
|
Parameter dwIndex is set to an invalid channel number, or parameter fLevel is not in the range 0.0 to 1.0. |
|
The audio endpoint device has been unplugged, or the audio hardware or associated hardware resources have been reconfigured, disabled, removed, or otherwise made unavailable for use. |
|
The Windows audio service is not running. |
Requirements
|
Minimum supported client |
Windows Vista [desktop apps only] |
|---|---|
|
Minimum supported server |
Windows Server 2008 [desktop apps only] |
|
Header |
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See also