It is worth a discussion, but not a conclusion. We will likely not hear the actual voices, nor the complete recording. We will be given "transcribed" pieces in support of what will be a "Point of View". Most will be happy with that, fearing criticism for being conspiracist. Go figures. but witholding data is not dishonest? Such sheep.
The tone and Pitch of each voice tells perhaps more than the words themselves. It will be dexcided that it is too painful, or some excuse.
What we see is what we are intended to see, and cannot refute, due the sparse data. As intended.
Captain knew nothing more than the others, we think. WHY? radical descent, and intense noise from the slipstream. Either could describe Nose UP, OR Nose Down. Pick em.