Um. Right ? And it has a header  it has a header format that  describes it  to some extent. So , the only problem with it is it 's actually storing the  utterance numbers and the  frame numbers in the file , even though they 're always sequential. And so it does waste a lot of space.
Hmm.
But it 's still a lot tighter than  than ASCII. And we have a lot of tools already to deal with it.
You do ? OK. Is there some documentation on this somewhere ?