Sub MFAudioMixDirect( _
   ByRef _plAudioOffsetSrc As Integer, _
   ByVal _pFrameMixFrom As IMFFrame, _
   ByRef _plAudioOffsetMix As Integer, _
   ByVal _lSamplesMixMax As Integer, _
   ByVal _dblGainStartDb As Double, _
   ByVal _dblGainEndDb As Double, _
   ByVal _bSymmetricGain As Integer _
) 

void MFAudioMixDirect( 
   out int _plAudioOffsetSrc,
   IMFFrame _pFrameMixFrom,
   out int _plAudioOffsetMix,
   int _lSamplesMixMax,
   double _dblGainStartDb,
   double _dblGainEndDb,
   int _bSymmetricGain
)

procedure MFAudioMixDirect( 
   Out  _plAudioOffsetSrc: Integer;
    _pFrameMixFrom: IMFFrame;
   Out  _plAudioOffsetMix: Integer;
    _lSamplesMixMax: Integer;
    _dblGainStartDb: Double;
    _dblGainEndDb: Double;
    _bSymmetricGain: Integer
); 

void MFAudioMixDirect( 
   [PARAMFLAG::Out] int _plAudioOffsetSrc,
   IMFFrame* _pFrameMixFrom,
   [PARAMFLAG::Out] int _plAudioOffsetMix,
   int _lSamplesMixMax,
   double _dblGainStartDb,
   double _dblGainEndDb,
   int _bSymmetricGain
) 

Parameters

_plAudioOffsetSrc

audio samples offset in source frame

_pFrameMixFrom

source frame

_plAudioOffsetMix

audio samples offset in mixed frame

_lSamplesMixMax

maximal amount of mixed samples

_dblGainStartDb

start audio gain

_dblGainEndDb

end audio gain

_bSymmetricGain

use symmetric gain (1) or not (0)

Reference

IMFFrame Interface
IMFFrame Members