Sub MFAudioMix( _
   ByVal _pFrameMixFrom As IMFFrame, _
   ByVal _dblGainStartDb As Double, _
   ByVal _dblGainEndDb As Double, _
   ByVal _bSymmetricGain As Integer, _
   ByVal _bsAudioBufferID As String _
) 

void MFAudioMix( 
   IMFFrame _pFrameMixFrom,
   double _dblGainStartDb,
   double _dblGainEndDb,
   int _bSymmetricGain,
   string _bsAudioBufferID
)

procedure MFAudioMix( 
    _pFrameMixFrom: IMFFrame;
    _dblGainStartDb: Double;
    _dblGainEndDb: Double;
    _bSymmetricGain: Integer;
    _bsAudioBufferID: String
); 

void MFAudioMix( 
   IMFFrame* _pFrameMixFrom,
   double _dblGainStartDb,
   double _dblGainEndDb,
   int _bSymmetricGain,
   BSTR* _bsAudioBufferID
) 

Parameters

_pFrameMixFrom

a frame for mixing audio

_dblGainStartDb

start gain in dB

_dblGainEndDb

end gain in dB

_bSymmetricGain

indicates whether symmetric gain will be used for both audio data ("1") or not ("0")

_bsAudioBufferID

ID of audio buffer

Reference

IMFFrame Interface
IMFFrame Members