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The GetChannelVolumeLevel method gets the volume level, in decibels, of the specified channel in the audio stream that enters or leaves the audio endpoint device.

HRESULT GetChannelVolumeLevel(
  UINT  nChannel,
  float  *pfLevelDB



[in]  The channel number. If the audio stream has n channels, the channels are numbered from 0 to n – 1. To obtain the number of channels in the stream, call the IAudioEndpointVolume::GetChannelCount method.


[out]  Pointer to a float variable into which the method writes the volume level in decibels. To get the range of volume levels obtained from this method, call the IAudioEndpointVolume::GetVolumeRange method.

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
E_INVALIDARG Parameter nChannel is greater than or equal to the number of channels in the stream.
E_POINTER Parameter pfLevelDB is NULL.


Client: Windows Vista

Header: Include Endpointvolume.h.

See Also

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