MFAudioChannelsUpdate Method (IMFFrame)
Update frame's audio channel's data or number of channels. Call this method after modification of memory that is returned by MFAudioChannelGetBytes() method. 
Syntax
Sub MFAudioChannelsUpdate() 
void MFAudioChannelsUpdate()
procedure MFAudioChannelsUpdate(); 
void MFAudioChannelsUpdate(); 
See Also

Reference

IMFFrame Interface
IMFFrame Members