In an audio media type, specifies the assignment of audio channels to speaker positions.
UINT32
GUID MF_MT_AUDIO_CHANNEL_MASK = {0x55fb5765,0x644a,0x4caf,{0x84,0x79,0x93,0x89,0x83,0xbb,0x15,0x88} }
This attribute corresponds to the dwChannelMask member of the WAVEFORMATEXTENSIBLE structure.
The GUID constant for this attribute is exported from mfuuid.lib.
Header: Declared in mfapi.h.