IAudioStreamVolume::SetChannelVolume method (audioclient.h)

The SetChannelVolume method sets the volume level for the specified channel in the audio stream.


HRESULT SetChannelVolume(
  [in] UINT32      dwIndex,
  [in] const float fLevel


[in] dwIndex

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.

[in] fLevel

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.


Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2008 [desktop apps only]
Target Platform Windows
Header audioclient.h

See also

IAudioStreamVolume Interface