WAVEFORMATEX

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The WAVEFORMATEX data structure defines common properties of an audio stream and occurs in a variety of multimedia file formats, including:

Since the format originated on Windows/Intel computers, the defined, multi-byte numbers are stored in little endian format, even if the data structure appears in QuickTime files.

bytes 0-1    wFormat
bytes 2-3    nChannels
bytes 4-7    nSamplesPerSec
bytes 8-11   nAvgBytesPerSec
bytes 12-13  nBlockAlign
bytes 14-15  wBitsPerSample
bytes 16-17  cbSize
bytes 18..   extradata